Table Of ContentBULLETIN DE L'INSTITUT ROYAL DES SCIENCES NATURELLES DE BELGIQUE
ENTOMOLOGIE, 69: 215-232, 1999
BULLETIN VAN HET KON! KLIJK BELGISCH INSTITUUT VOOR ATUURWETENSCHAPPEN
ENTOMOLOGIE, 69: 215-232, 1999
New and little known species of Dolichopodidae from China (V)
by Ding YANG and Patrick GROOTAERT
Abstract long as apical segment. Proboscis brownish, with black
hairs; palpus brownish yellow, with black hairs and l
18 species of Dolichopodidae from China are described as new to apical bristle.
science: I lercos1011111s (Cy11111op1ern11s) collecti\'lls, Hercos10111us (Her
Thorax metallic green, with pale grey pollen. Hairs and
co.1·1011111.1) apirnla111s, /-/. (//.) serru/a111s. H. (H.) flatus. Argyra (Le11-
cos10/a) si11e11sis. 1\/achaeri11111 he11a11e11se, Chae1ogo11optero11 111e11- bristles on thorax black; 5 strong de; 9-I 0 irregularly
g/011ga1111111, C. 111e11g/1111e11se. Diaphorus a/amaculatus. D. basi11iger. paired acr, short and hair-like, backward not reaching to
D. hise111s. D. ce111rif/m•11s. D. e/011ga111s, D. hebeie11sis, D. 111e11g/1111a-
5th de; scutellum with chiefly short black hairs on dorsal
1111s. D. 111e11gya11gc11111s. D. qi11gc/1e11gslw11us. D. xi::a11ge11sis. The
species of the genus Diaphorus from the mainland of China are surface and apical margin. Propleuron pale haired, with 1
rc\'ic\\'cd and a key is gi,·en for the males. long black bristle on lower paii. Pteropleuron with a
group of fine hairs just in front of posterior spiracle. Legs
Key words: Dolichopodidae, new species, China
yellow; coxae yellow, mid coxa with a large black spot;
tarsi from tip of tarsomere 1 onward brownish to brown.
Hairs and bristles on legs black; all coxae with black hairs
Introduction and bristles. Mid and hind fernora each with 1 preapical
bristle. Fore tibia with l ad, a row of short ad on apical 2/3
In the present paper. 20 species of Doiichopodidae and 2 pd; mid tibia with 3 ad 2 pd and l av; hind tibia
from China are described. Among them I 8 species are with 2 ad, 3 pd and 2-3 av. Relative lengths of segments
new to science, and 2 species (Diaphorus nigricans MEI (excluding coxae, trochanters and femora) of legs Ll 3 .3:
GFN, I 82-t; D. parenti STACKELBERG, I 928) are newly I .7: 0.8: 0.7: 0.4: 0.4; LIT 4.9: 2.2: 1.2: 1.0: 0.9: 0.55; Llll
recorded from China. A key to the species of Diaphorus 5.4: l.4: 2.0: 1.2: 1.0: 0.6.
from the mainland of China is given. The types of the new
species are deposited in the Insect Collection of China
Agricultural University except for some para types kept in
the Royal Belgian lnstitute of natural Sciences in Bru -
sels.
1. Hercostomus (Gy11111opterns) collectivus sp. nov.
1
(Figs. 1-3)
Diagnosis. Antenna blackish, with pedicel and base of 2
first flagcllomere brownish yellow. Hind tibia with 2-3
av. Lateral lobe on epandrium rather thick, with apex
somewhat acute, with 3 closely bristles set.
1v!ale. Body length 3.0 mm, wing length 3.3 mm.
Head metallic green, with pale grey pollen. Face about
as wide as first flagellomere. Hairs and bristles on head
black: postocular bri ties (including ventral hairs) wholly
black. Antenna (Fig. I) blackish with pedicel and base of
first flagellomere brownish yellow; first flagellomere l.2 Figs. 1-3 - Hercostomus (Gy11111opterns) collectivus sp. nov.,
times lonocr than wide anoular apically; arista blackish, male. I. antenna, lateral view; 2. genitalia, lateral
distinctly b pubescent, w, ith b basal segment 0.25 times as view; 3. apical processes, lateral view.
216 Ding YANG and Patrick GROOTAERT
Wing slightly tinged with greyish; veins blackish, first
section of C somewhat thickened medially, R4+5 and M
parallel apically; CuAx ratio 0.8. Squama yellow, with
I
black hairs. Halter yellow. '.II,I 4
Abdomen metallic green, with pale grey pollen; hairs
black. T-Typopygium (Fig. 2-3) rather small: Epandrium
distinctly longer than wide, with narrow apex, its lateral
6
lobe rather thick with somewhat acute apex, with 3
bristles set closely; cercus rounded apically; hypandrium
thick and more or less traight apically.
··-.. •c-:\
Female. Unknown.
~
HolotJ'pe male: Zhejiang: Tianmushan, Sanliting, 1998.
V. 30, I-long Wu. (CAU)
Di tribution. China (Zhejiang). Figs. 4-6 - Il ercosto11111s (Hercosto11111s) apicula//ls sp. nov.,
male. 4. antenna, lateral view; 5. hind tibia and
tarsomere 1, lateral view; 6. genitalia. lateral
Etymology: the name alludes to the closely set hairs on
view.
the lateral lobe of the epandrium.
Remarks. This species is somewhat similar to H. :::ieheni
PARE T from Russia. It can be easily separated from
the latter by having the antenna blackish, with pedicel blackish; apical part of hind tibia blackish; fore and mid
and base of first tlagellomere brownish yellow, and tarsi, from tip of tar omere I onward. brown to dark
hind tibia with 2-3 av. In H. :::ieheni, the antenna is wholly brown, hind tarsus wholly dark brown. Hind tibia thick
pale, except apex of first tlagellomere that is somewhat ened apically, with a long ventral spine, hind tarsomere I
dark; hind tibia has 1 av (STACKELBERG, 1933). It may basally with a thick ventral spine curved upward (Fig. 5).
be easily separated from H. jishanensis WEI from Guiz I-lairs and bristles on legs black. Mid and hind femora
hou and H. congruens BECKER from Southern China each with I preapical bristle. Fore tibia with I ad and 2
(including Taiwan) by having the lateral lobe on epan pd; mid tibia with 3 ad. 2 pd and I av: hind tibia with 2 ad
drium short and thick. In H. jishanensis and H. con and 3 pd. Relative lengths of segments of legs LI 4.0: 2.2:
gruens, the lateral lobe on epandrium is slender (HENNIG, 1.2: 0.9: 0.65: 0.5; Lll 6.0: 4.8: 2.8: 1.5: 1.0: 0.75: Lill
941; WEI. 1997). 6.8: 2.2: 2.8: I .7: 1.0: 0.8.
Wing slightly tinged with grey; veins blackish. R4+5
and M convergent apically; CuAx ratio 0.5. Squama
2. Hercostomus (Hercostomus) apiculatus sp. nov. yellow, with black hairs. Halter yellow.
(Figs. 4-6) Abdomen metallic green, with pale grey pollen; hairs
black. Hypopygium (Fig. 6): Epandrium much longer
Diagnosis. First tlagellomere distinctly elongated, with than wide, more or less acute apically. its lateral lobe
acute apex. Hind tibia thickened apically, with a long rather wide with furcate apex; cercus somewhat triangu
ventral spine, hind tarsomere 1 basally with a thick lar. distinctly incised apically with marginal denticles;
ventral spine curved upward. hypandrium rather short and irregularly furcate.
Male. Body length 3.3 mm, wing length 3.7 mm. Female. Unknown.
I-lead metallic green, with pale grey pollen. Face dis
tinctly narrower than first flagellomere. Hairs and Holotvpe male: Zhejiang: Tianmushan, Sanliting, 1998.
bristles on head black; postocular bristles (including V. 30, Hong WU. (CAU)
ventral hairs) wholly black. Antenna (Fig. 4) black:
first tlagellomcre blackish basally, distinctly elongated Distrihut ion. China (Zhejiang).
(2.3 times longer than wide), acute apically; arista black,
very hort pubescent, with basal segment 0.7 times as Etymology. The name refers to the ornamentation of hind
long as apical segment. Proboscis brownish, and palpus tarsomere I.
black. with blackish hairs; palpus with I black apical
bristle. Remarks. This species is very peculiar. It may be easily
Thorax metallic green, with pale grey pollen. Hairs and separated from other known species of the genus by
bristles on thorax black; 4-5 i1Tegularly paired acr. short having the hind tibia thickened apically. with a long
and hair-like, 6-7 strong de; scutellum without short hairs. ventral spine, and hind tarsomere I basally with a thick
Legs yellow; coxae yellow, mid coxa (except apex) ventral spine curved upward.
Dolichopodidae from China (V) 217
3. Hercostomus (Hercostomus) serrulatus sp. nov.
apically; cercus rather large apically, with some strong
(Figs. 7-9)
marginal bristles; hypandrium long, and inegularly fur
cate.
Diagnosis. First flagellomere rather shoit. Abdominal
sternum 7 with tiny denticles apically.
Female. Body length 4.7-5.0 mm, wing length 5.7-6.0
mm. Similar to male.
Male. Body length 5.7 mm, wing length 5.4 mm.
Head metallic green, with pale grey pollen. Face as Holotype male: Zhejiang: Tianmushan Mountain, Sanlit
wide as first flagellomere. Hairs and bristles on head ing, 1998. Y. 30, Hong Wu.
black; postocular bristles (including ventral hairs) wholly
black. Antenna (fig. 7) wholly black; first flagellomere Paratypes:, Zhejiang: Tianmushan, Canyuanshi, 1998. Y.
rather short ( 1.3 times longer than wide), obtuse apically; 29, l male, 2 females, Zhiyong Yu. (CAU).
arista black, with basal segment 0.4 times as long as
apical segment. Proboscis and palpus yellow, with black Distribution. China (Zhejiang).
hairs; palpus with 1 black apical bristle.
Thorax metallic green, with pale grey pollen. Hairs and Etymology. The name refers to the denticulation on ster
bristles on thorax black; 7-8 irTegularly paired acr, short num 7 of abdomen.
and hair-like, 6 trong de. Propleuron pale haired, with l
black bristle on lower part. Remarks. This species is somewhat similar to H. (H.)
Legs yellow; coxae yellow, mid coxa with a black Jen ta/is YANG from Xizang, but may be separated from
outer spot; tarsi from tip of tarsomere l onward brown the latter by having the first flagellomere obtuse apically.
to dark brown. Hairs and bristles on legs black; fore coxa In H. dentalis, the first flagellomere is acute apically
with short pale hairs, and apically with some black bris (YA G, 1997).
tles. Mid and hind femora each with 1 preapical bristle.
Fore tibia with 1 ad and 2 pd; mid tibia with 3-4 ad, 2 pd
and 3 av; hind tibia with 3--J. ad, l d, 4 pd and 6 av. 4. Hercostomus (Hercostomus) flatus sp. nov.
Relative lengths of segments of legs LI 6.2: 3.5: 2.0: 1.5: (Figs. I 0-1 I)
1.2: 0.75; LI! 10.0: 4.4: 2.7: 2.1: 1.3: 0.8; LIIl 11.3: 2.9:
-J.. I: 2.3: 1.3: 0.9. Diagnosis. First flagellomere rather large with flat apex.
Wing grey; veins black, R4+5 and M distinctly con Lateral lobe on epandrium rather large.
vergent apically; CuAx ratio 0.8. Squama yellow, with
black hairs. Halter yellow. Male. Body length 4.0-4.8 mm, wing length 4.1-4. 7 mm.
Abdomen metallic green, with pale grey pollen; hairs Head metallic green, with pale grey pollen. Face
black. Sternum 7 (Fig. 8) with some tiny denticles. Hy slightly narrower than first flagellomere. Hairs and
popygium (Fig. 9): Epandrium distinctly longer than bristles on head black; postocular bristles (including ven
wide. wide apically. its lateral lobe distinct, and nearly tral hairs) wholly black. Antenna (Fig. I 0) yellow; first
straight, posteriorly with a distinct projection that is acute flagellomere with dorsal surface and apical part black,
rather large (1.5 times longer than wide). flat apically;
arista black, with basal segment 0.8 times as long as
apical segment. Proboscis brownish yellow, and palpus
yellow, with black hairs; palpus with I black apical
bristle.
Thorax metallic green, with pale grey pollen. Hairs and
bristles on thorax black; 6-7 irregularly paired acr, short
and hair-like, 6 sh·ong de. Propleuron pale haired, with I
black bristle on lower part.
Legs yellow; coxae yellow, mid coxa with a blackish
outer spot; tarsi from tip oftarsomere I onward brown to
dark brown. Hairs and bristles on legs black. Mid and
hind femora each with I preapical bristle. Fore tibia with
I ad. 2 pd and I short av; mid tibia with 3 ad, 2 pd and I
av; hind tibia with 3 ad, 3 pd and 6 av(ofwhich 2 av near
apex are stronger); hind tar omere I with 3 v. Relative
lengths of segments of legs LI 5.0: 2.7: 1.3: 1.1: 0.8: 0.5;
LII 7.0: 3.7: 2.2: 1.9: I. I: 0.7; Lill 8.0: 2.2: 3.2: 2.1: 1.3:
0.75.
Wing hyaline; veins blackish, R4+5 and M distinctly
Figs. 7-9 / lercosto11ws (I lerco 1011111.1) sermlatus sp. nov.,
convergent apically; CuAx ratio 0. 7. Squama ye! low,
male. 7. antenna. lateral view: 8. pregenital seg
with black hairs. Halter yellow.
ments, lateral view: 9. genitalia, lateral view.
218 Ding YA G and Patrick GROOTAERT
black; middle and lower postocular bristles (including
ventral hairs) pale. Antenna (Fig. l 2) blackish; first fla
gellomere dark yellow, with basal and dorsal margin
black, slightly elongated (2.1 times longer than wide),
somewhat acute apically; arista black, with basal segment
0.25 times as long as apical segment. Proboscis dark
11 brown, with black hairs; palpus yellow, with black hairs,
and I black apical bristle.
Thorax metallic green, with pale grey pollen. Hairs
and bristles on thorax black; 5-6 irregularly paired
acr, short and hair-like, 6 strong de; scutellu111 with
2 strong apse and 2 hair-like lsc. Propleuron black
haired.
Legs yellow; all coxae yellow; apex of hind femur
brown; mid and hind tarsi from tip oftarso111ere I onward
brown to dark brown. Hairs and bristles on legs black;
Figs. I 0-11 - Hercosto111us (HercosF011111s) flatus sp. nov .. fore coxa with black hairs and 4 black apical bristles
male. I 0. antenna , lateral view: 11. genitalia, anteriorly, mid coxa with black hairs and I black bristle
lateral view. anteriorly; hind coxa with I hort black hair and I long
black bristle laterally. Fore tibia with I weak pc.I, tar
somere 1 with 4 short v; mid tibia with 2 ad, 2 short pd
and 2 av; hind tibia with I short ad and a row of pd.
Relative lengths ofseg111cnts of legs LI 3.2: 2.1: 0.7: 0.5:
Abdomen metallic green, with pale grey pollen: hairs 0.3: 0.3; LI! 4.4: 2.3: 1.0: 0.8: 0.45: 0.3: LIIl 6.0: 1.5: 1.-t:
black. Hypopygium (Fig. 11 ): Epandrium longer than 1.0: 0.6: 0.4.
wide, narrow apically, its lateral lobe separated and rather Wing weakly tinged with grey; veins blackish, Cell
large; cercus rather large, with I thick apical bristle R5 widest behind 111-cu, R4+5 and M parallel apically;
directed inward; hypandrium inci ed medially, with CuAx ratio 0.4. Squama yellow. with pale hairs. I !alter
somewhat bent lateral arm. yellow.
Abdomen metallic green. with pale grey pollen: terga
Female. Unknown. 2-3 each with I large yellow lateral spot, sternum I
yellow; hypopygium black, with yellow cercus. Hairs
Holotype male: para type male, Zhejiang: Tianmushan
Mountain, Laodian (I I 00-1200 m), 1998. V. 30, Hong
Wu. (CAU)
Distribution. China (Zhejiang).
Etymology. The name refers to the large epandrial lobe
(Lat. .flatus = blown up, inflated).
Remarks. This species is somewhat similar to H. (H.)
intact us WEI from Yun nan, but may be seaprated from the
latter by having the first flagellomere yellow basally, and
lateral lobe on epandrium rather large. In H. intactus, the
first flagellomerc is dark, the lateral lobe on epandrium is
very small (WEI, 1997).
5. Argyra (Leucostola) si11e11sis sp. nov.
(Figs. 12-13)
Diagnosis. Fore coxa with black hairs and bristles. First
flagellomere dark yellow, with black basal and dorsal
111arg111s.
Male. Body length 3.8 111111, wing length 3.2 111111.
Figs. 12-13 - Argrra (leucostola) sinensis sp. nov., male.
Head metallic green. with pale grey pollen. Face nar
12. antenna. lateral view: 13. genitalia, lateral
rower than first flagellomere. Hairs and bristles on head view.
Dolichopodidae from China (V) 219
on abdomen black. Hypopygium (Fig. 13): Epandrium
longer than wide, somewhat narrow apically, surstylus
with narrow dorsal lobe (bearing 1 shmi thick apical
bristle) and slightly wider venh·al lobe that is distinctly 14
bent; cercus tapering toward apex, with 1 long apical
bristle; hypandrium long and slightly curved.
Female. Unknown.
Holotype male: Zhejiang: Tianmushan Mountain, Zhu 15
tuojing, 1998. V. 31, Zhiyong Yu. (CAU)
Distribution. China (Zhejiang).
Etymology. The name sinensis means "Chinese" and
refers to the country of origin.
Remarks. This species is similar to A. vanoyei PARENT
from Shanghai and A. negrobovi GRJCHANOV and SHAM
Figs. 14-15 - Machaerium henanense sp. nov., male. 14.
SHEV from Russia. It differs from A. va11oyei in the
antenna (excluding scape and pedicel), lateral
following points: fore coxa with black bristles, hypopy
view; 15. genitalia, lateral view.
gium with strong bristles, mid tibia with 2 av; A. vanoyei
has the fore coxa with pale bristles, hypopygium without
strong bristles (PARE T, 1927; GRiCHANOV & SHAMSHEV,
1993). lt may be separated from A. negrobovi in the
following points: mid coxa completely yellow, abdom mid and hind femora each with 1 preapical bristle. Fore
inal segments I-III black with, large yellow lateral spots tibia with I ad at middle; mid tibia with 2 ad and 2 pd;
on terga 2-3 and yellow sternum I, hypandriurn rather hind tibia with 2-3 pd. Hind tarsomere l with 1 acute
long; A. negrobovi has mid coxa with brown spot, ab basal process on inner surface, curved upward. Relative
dominal segments I-III yellow, with black stripe on pos lengths of segments of legs LI 2.6: 1.5: 1.0: 0.9: 0.7: 0.35;
terior margins, hypandrium rather short (GRiCHANOV & Lll 3.7: 2.1: 1.2: 1.0: 0.7: 0.35; LIII 4.2: 1.0: 1.7: 1.1: 0.7:
SHAMSHEV, 1993). 0.35.
Wing hyaline; veins brown, R4+5 and M weakly di
vergent apically; CuAx ratio 0.35. Squama yellow, with
6. Macltaerium '1e11ane11se sp. nov. brown margin, bearing black hairs. Halter yellow.
(Figs. 14-15) Abdomen pale metallic green, with pale grey pollen;
hairs blackish. Hypopygium (Fig. 15): Epandrium longer
Diagnosis. First tlagellomere with nearly straight venh·al than wide, its ventral apex incised, and bearing 2 strong
margin; arista longer than first tlagellomere. All coxae bristles; cercus long and furcate; hypandrium with acute
yellow. Squama with black hairs. venh·al tip.
Male. Body length 1.9 mm, wing length 2.2 mm. Female. Unknown.
Head metallic green, with pale grey pollen; occiput
with mid-upper part concave. Face narrowing downward, Holotype male: Henan: Neixiang, 1998. VII. 14, Xueyou
slightly narrower than first tlagellomere. Hairs and bris Hu. (CAU)
tles on head black; postocular bristles (including ventral
hairs) wholly black. Antenna (Fig. 14) wholly black; first Distribution. China (Henan).
tlagellomere distinctly elongated (2.6 times longer than
wide); arista black, apical, distinctly longer than first Etymology. The name refers to the type locality.
flagellomere. Proboscis brownish yellow, with black
hairs; palpus brown, with black hairs and 2 black apical Remarks. This species is similar to M. orientalis YANG et
Li from Zhejiang, but may be easily separated from the
bristles.
latter by having the following characters: first tlagello
Thorax pale metallic green, with pale grey pollen.
mere with nearly straight ventral margin, arista distinctly
Hairs and bristles on thorax blackish; 5-6 irregularly
longer than fast tlagellomere, all coxae yellow, squarna
paired acr, short and hair-like, 5 strong de; 2 npl, l su,
with black hairs; in M. orientalis: first flagellomere with
2 sa, I pa; scutellum with 2 long apse and 2 very short
out straight venh·al margin, arista shorter than first fla
hair-like lsc. Propleuron with l black bristle on lower
gellomere, all coxae blackish, squama with pale hairs
part. Legs yellow; all coxae yellow. Hairs and bristles on
legs black. Mid and hind coxae each with I outer bristle; (YANG & Li, 1998).
220 Ding YA G and Patrick GROOT AERT
7. Clwetoaonopteron 111englo1wm1111n p. nov. I ba ally with I bent thin v and 2 long thick v; hind
(Figs. 16-18) tibia with 3 pd medially and 4 long v, set clo ely on
basal 2/5, hind tarsomeres 1-2 (Fig. 16) distinctly hor
Diagnosis. Thorax and abdomen largely brownish yel tened, tarsomere I flattened and elongated ventrally,
low. Mc onotum with a large subtriangular spot; scutel tarsomere 2 with I pale appendage. incised apically;
lum metallilic green, with yellow apical margin. Eye tarsomere 3 elongated, but gently curved basally. Rela
narrowly separated. Acr ab ent. tive length of segments of legs LI 4.8: 6.2: 2.9: 1.6: 0.8:
0.4; Lll 9.0: 4.9: 2.8: 1.8: 0.8: 0.35: Lill 10.2: 0.7: 0.7:
Male. Body length 3.5 mm, wing length 4.3 mm. 3.8: 1.8: 0.4.
Head metallic green, with pale grey pollen. Face rather Wing hyaline, weakly tinged with yellowish; vein
narrow, with medial part very narrow, with den e white brown, R4+5 and M parallel apically; CuAx ratio 0.9.
pollen. Hairs and bristle on head black; middle and lower Squama browni h yellow. with black margin. bearing
postocular bristles (including ventral hairs and bristle ) dark brown hairs. Halter brownish yellow.
pale. Antenna (Fig. 17) yellow: first flagellomere brown. Abdomen pale brownish yellow; tergum 2. basal part
ubtriangular; ari ta dor al, black, distinctly pubescent. of terga 3-4 somewhat dark. Hairs on abdomen black.
Proboscis dark brown, with blacki h hair : palpus pale Hypopygium (Fig. 18): Epandrium di tinctly longer than
yellow, ' ith black hair . wide. omewhat narrow apically. ur tylu with slightly
Thorax brownish yellow, with pale grey pollen; meso narrow dorsal lobe (bearing 2 bristles at middle) and
notum with a large subtriangular metallic green median slightly wider ventral lobe (bearing 4 bristles at apex
spot (which extends forward to lst de); scutellum metallic and 2 clo e bristles on weak ba al projetion): cercu ·
green, with yellow apical margin. Pteropleuron just be tapering toward apex. with inci ed outer margin: hypan
low quama, and metapleuron behind wing base, each drium weakly curved.
with a small black spot. Hairs and bristles on thorax
black: 6 trong de; acr ab ent. only 3-4 irregular pair Female. Unknown.
present in front of first de. Propleuron pale haired, with I
pale weak bristle on lower aort. Holotype male: Yunnan: Xishuangbanna. lcnglong.
Legs yellow; all coxae brownish yellow to yellow, mid ( 1600 m). 1959. VII. 26, Suyong WAN<i. (CAU)
coxa with a small black pot at postero-upper corner.
Hairs and bristle on leg black: hair and bristle on Distriblllion. China (Yunnan).
coxae black, fore coxa basally with pale hairs; mid coxa
with 2 outer bristles; hind coxa with I outer bristle. Mid Etnnology. The name refers to the type local it;.
and hind fcmora each with I anterior preapical bristle.
hind femur with a row of 9-10 weak v on ba al ha! f. Remarks. This species is somc\\'hat similar to l11reo-
Fore tibia at tip with I long brownish yellow lateral 1·iridis P,\RL:\T from Tai\\'an. but may be separated from
bristle. fore tar us with a row of fine v: mid tibia with 3 the latter by ha\ ing the eyes natTO\\ ly separated. In
ad, I pd, and a row of 17-19 long weak v (which arc l11te01•iridis, the eyes arc contiguous on the face ( P,\RI· T.
gradually becoming sho1t toward apex). mid tarsomere 932).
8. Clwetogonopteron 111eng/1111ense sp. no\.
(Figs. 19-21)
Diagnosis. Thorax and abdomen largely yello\\. Meso
notum "ith a large subtriangular spot: scutellum metallic
17
16 green, with yellow lateral angle. Eyes contiguous. Fore
tarsomcre 2 somewhat shortened. Wing with a large
18
apical spot occupying \\'hole apex: R4+5 and M feebly
convergent apically: CuAx ratio 1.1.
Male. Body length 3.6 mm, wing length 4.0 mm.
Head metallic green. with pale grey pollen. Face very
natTO\\: eyes contiguous on middle of face for some
distance. Hairs and bristles on head black: middle and
lower postocular bristles (including \entral hairs and
bristles) pale. Antenna [first llagcllomere missing] yel
low. Proboscis dark bro\\ n. \\'ith blackish hairs: pal pus
Figs. 16-1 Chae10go11optcm11 111e11glo11ga1111111 sp. no\ ..
or partly visible. dark brown.
male. 16. basal part hind tarsomcre 1. lateral
\ ie\\: 17 . antenna. lateral 'JC\\: 18. genitalia. Thorax yellO\\. with pale grey pollen: mesonotum
lateral 'ic\\. with a large subtriangular metallic green median spot
Dolichopodidae from China (V) 221
Female. Unknown.
Holotype male Yunnan: Xishuangbamia, Menglun (800
m), 1981. IV. 10, Fasheng LI (CAU)
Distribution. China (Yunnan).
Etymology. The name refers to the type locality.
Remarks. MEUFFELS & GROOTAERT (1987) mentioned
4 Oriental species and 1 Australian species with a dark
apical wing spot. The present new species is similar
to Ch. sticticum MEUFFELS & GROOTAERT from New
Guinea in having acr, but differs from the latter in the
Figs. 19-21 - Clwe10go11optero11 111e11g/1111ense sp. nov.,
following points: apical spot occupying whole apex,
male. 19. basal part of hind tarsomere 1, lateral
R4+5 and M little convergent apically, fore tarsomere
view; 20. wing; 21. genitalia, lateral view.
2 shortened (distinctly shorter than tarsomere 3); in
Ch. sticticum: apical spot on wing narrower and not
reaching M, R4+5 and M parallel apically, fore tarsomere
2 longer than tarsomere 3 (MEUFFELS & GROOTAERT,
(which extends forward to 1s t de and is somewhat 1987).
pale anteriorly); scutellum metallic green, with yellow
lateral angle. Pteropleuron just below wing base, and
mctaplcuron behind wing base each with a small Genus Diaphorus MEIGEN, 1824
black spot. Hairs and bristles on thorax black; 6
strong de; 4 irregular paired acr (not reaching 3rd de). Diagnosis. Eyes of male natrnwly separated or con
Propleuron pale haired. with I black bristle on lower tiguous on frons. Face rather wide and parallel-sided.
part. First flagellomere rather small and sho1t, usually wider
Legs [mid tarsomeres 2-5 missing] yellow: all coxae than long: arista with very sho1t basal egment. 1 h, 2
yellow, mid coxa with a small black spot at postero-upper npl, I su, 2 sa, I pa, 5 strong de, biseriate acr; scutellum
corner. Hairs and bristles on legs black, but tho e on with 2 strong apse and 2 short hair-like lsc. Pro
coxae also black: mid and hind coxae each with I outer pleuron haired, with l long bristle on lower part. Mid
bristle. Fore tarsomeres 1-2 with a row of v (but tar and hind femora without preapical dorsal bristle. Mid
somere I basally without v and tarsomere 2 with denser coxa with 2 outer bristles; hind coxa with I outer
v), tarsomerc I basally with I long v. Mid tibia weakly bristle. Fore tarsus usually without claws, but rarely
curved. with 3 ad. I pd, a row of long thin av (which are with l or 2 claws. Wing with rather large anal lobe;
absent basally). a row of thick v (of which 3 bristles near R4+5 and M parallel apically. Sternum 8 with 4-8 strong
apex arc the longest): mid tarsomere I basally with I bent bristles.
\' an<l I straight\'. Hind tibia with 6 pd (of which 2 bristles The genus Diaphorus has a world-wide distribution.
arc short): hind tarsomeres (Fig. 19) 1-2 distinctly shor Only 3 species were known to occur in the mainland
tened, tarsomere 2 with pale, weakly curved clidium; of China: D. /icht111ardti PARENT, 1925, D. luteipes
tarsomere 3 elongated. Relative lengths of segments of PARENT, 1925 and D. mandarinus WIEDEMA 1830
legs LI -U: 4.3: 1.2: 1.6: 0.6: 0.35: Lll 7.5: 4.8:?:?:?:?; ( EGROBOV. 1991 ), and 13 species from Taiwan (DYTE,
Lill 9.7: 0.6: 0.9: 3.9: 1.7: 0.35. 1975). The species of the genus Diaphoms from the
Wing (Fig. 20) hyaline. apically with a large black mainland of China are reviewed, with descriptions of
spot. occupying whole apex: \'eins brown, R4+5 and M I 0 new species and 2 species newly recorded from
little conYergent apically: CuAx ratio 1.1. Squama China.
brownish yellow, with black margin, bearing dark brown
hairs. Halter brownish yellow.
Abdomen yellow: middle part ofterga 2-4 dark brown. Key to males of the Diaphorus species from China
I lairs on abdomen black: tergum I with a row of bristles (species from Taiwan not included)
at posterior margin (which arc longer laterally). Hypogy
gium (Fig. 21 ): Epandrium distinctly longer than wide, l. Fore tarsus without claws . . . . . . . . . . . . . . . . . . 2
somewhat narrow apically, surstylus with narrow dorsal - Fore tarsus with I or 2 claws . . . . . . . . . . . . . 15
2. Mid and hind tarsi each with 2 claws [unknown in the
lobe (bearing I bristle at middle) and slightly wider
,·entral lobe (bearing 3 bristles at apex and 2 separated case of elongatus] . . . . . . . . . . . . . . . . . . . . . . . 3
- Fore and mid tarsi without claws, only hind tarsus
bristles on weak basal projection); cercus narrow api
with 2 claws. (Yunnan, Zhejiang, Fujian, Hainan,
cally, with truncate apex; hypandrium rather thick, and
Taiwan) ........ ...... mandarinus NEGROBOV
nearly straight.
222 Ding YANG and Patrick GROOTAERT
3. Abdominal dorsum wholly black . . . . . . . . . . . . 4 omrnatidia somewhat enlarged. Hairs and bristles on head
- Abdominal dorsum partly yellow basally . . . . 11 black; middle and lower postocular bristles (including
4. Venter wholly black . . . . . . . . . . . . . . . . . . . . . . 5 ventral hairs) pale yellow. Antenna (fig. 22) black; first
- Sterna 1-3 yellow; cercus much elongated. (Xin flagellomere rather short, 1.8 times wider than long; arista
jiang) . . . . . . . . . . . . . . . . . . . elongatus sp. nov. black, with basal segment rather short. Proboscis dark
5. All femora chiefly black . . . . . . . . . . . . . . . . . . . 6 brown, with black hairs; palpus yellow, with 3 black hairs
- All femora yellow. (Shanghai) . . luleipes PARE T and I black apical bri tie.
6. Postocular bristles wholly black . . . . . . . . . . . . . 7 Thorax metallic green, with pale grey pollen. Hairs and
- Mid and lower postocular bristles yellow; wing hya bristles on thorax black; 6-7 irregularly paired acr, sho1t
line. (Hebei) . . . . . . . . . . . . . . hebeiensis sp. nov. and hair-like, 5 strong de. Propleuron with 2 black hairs
7. Halter yellow; palpus yellow . . . . . . . . . . . . . . . 8 on upper part, and 2 black hairs and I black bristle on
- Halter black; pal pus brown or black . . . . . . . . 10 lower part.
8. Hind tibia yellow or dark yellow, with dark apex 9 Legs yellow; all coxae black, trochanters yellow; fore
- Hind legs wholly black. (Siclrnan) ........... . and mid femora with basal part blackish to black, hind
. . . . . . . . . . . . . . . . . . . qingchengshanus sp. nov. femur wholly black; hind tibia black with basal half
9. Hind femur apically with long hairs. (Yunnan) .... brownish yellow; fore tarsomere 5 dark brown, mid tarsus
. . . . . . . . . . . . . . . . . . . . . . 111e11glu11a11us sp. nov. from tip of tarsomere I onward brownish to brown, hind
- Hind femur apically without long hairs. (Yunnan) tarsus entirely dark brown. Hairs and bristles on legs
. . . . . . . . . . . . . . . . . . . . mengyangensis sp. nov. black. Fore coxa with 4-5 bristles, mid coxa with 2 outer
10. Wing dark brown. (Herran) . . . nigricans MEIGEN bristles and hind coxae with I outer bristle; fore femur
- Wing weakly tinged with greyish. (Yunnan) .... with a row of short av and a row of longer pv. hind femur
. . . . . . . . . . . . . . . . . . . . . . . . . bisetus sp. nov. apically with a row of av and some long ventral hairs.
I I. At least mid and hind femora partly or mostly black Fore tibia with 1 ad and 2 pd; mid tibia with 2 ad. 3 pd and
12 l av; hind tibia with 2 ad, 6 pd and 6 thin av. Fore tarsus
- All femora yellow. (Hebei) .. basiniger sp. nov. without claws, but with 2 elongated pulvilli nearly as long
12. All femora chiefly black . . . . . . . . . . . . . . . . . 13 as tarsomere 5, mid and hind tarsi with 2 small claws.
- Fore femur yellow; mid femur black, with apical Relative lengths of segments LI 4.-+: 2.5: 1.1: 0.9: 0.5: 0.5;
1/3 yellow; hind femur yellow, with base and apex LI! 5.3: 3.1: 1.4: 1.0: 0.6: 0.25; Lill 6.9: 2.0: 2.0: I. I: 0.8:
black. Hind femur with two rows of very long ventral 0.3.
hairs. (Yunnan) . . . . . . . . . centrifla\lus sp. nov. Wing dark brown, with basal part and outer and
13. Hind tibia apically partly black ............ 14 posterior margin somewhat pale; veins dark brown to
- Hind tibia wholly yellow. (Jiangxi) . .. ...... . black. R4+5 and M nearly parallel apically: CuAx ratio
. . . . . . . . . . . . . . . . . . . . . . . lichll'ardti PARENT 0.45. Squama nearly yello\\'. \\'ith black hairs. Halter
14. Hind tibia yellow, with black apex; wing hyaline, yellow.
weakly tinged with greyish. (Xizang) ... .. .. .. . Abdomen metallic green. with pale grey pollen: tergum
. . . . . . . . . . . . . . . . . . . . . . xi::angensis sp. nov.
- Hind tibia black, with basal half brownish yel-
low; wing dark brown. (Yunnan) ..... . ...... .
. . . . . . . . . . . . . . . . . . . . . alamaculatus sp. nov.
15. All tarsi with 2 claws; legs mainly yellow. (Hainan)
. . . . . . . . . . . . . . . . . . . . . . . longshiensis YANG
- Fore and mid tarsi each with 1 claw, hind tarsus
with 2 claws; leg wholly black. ( ingxia, Hebei,
Henan) ............... parenli STACKELBERG
1. Diaphorus a/amacu/atus sp. nov.
(Figs. 22-23)
Diagnosis. Middle and lower postocular bristles pale
yellow. Fore and mid femora blackish to black basally,
hind femur wholly black; hind tibia black, with basal half
brownish yellow. Wing dark brown, with basal pa11 and
outer and posterior margin somewhat pale.
Male. Body length 4.4 mm, wing length 3.8 mm.
Head metallic green, with pale grey pollen. Ocellar
Figs. 22-23 - Diap/wrus ala111ac11/0111s sp. nov., male. 22.
tubercle distinct. Eyes contiguous for a long distance
antenna (excluding scape and pedicel). lateral
(about half as long as frons) on frons. with dorso-anterior view: 23. genitalia. lateral 'iew.
Dolicbopodidae from China (V) 223
2 (except very narrow posterior margin) yellow, tergum 3
brownish yellow, with anterior and posterior margins
black; sterna 1-3 yellow. Hairs and bristles on abdomen
black, terga 1-5 with a row of bristles on posterior mar
gins. Hypopygium (Fig. 23): sternum 8 with 4 sh·ono
b
bristles; surstylus with dorsal lobe longer, and somewhat
incised medially; ventral lobe straight, and uniformly
wide, bearing 2 apical bristles.
Fe111ale. Unknown.
Holotype 111ale: Yunnan: Mengyang, 1999.IIL 11 (99091,
leg. Patrick GROOTAERT. CAU).
Distribution. China (Yunnan).
£t.\'111ology. The name refers to the dark brown wing.
Remarks. This new species is somewhat similar to D .
.ri::.a11ge11si.1· sp. 110v., but may be separated from the latter
Figs. 24-25 - Diaphorus basi11iger sp. nov., male. 24. anten
by the dark brown wing. In D. xi::.angensis, the wing is
na (excluding scape and pedicel), lateral view;
hyaline, tinged weakly with greyish.
25, genitalia, lateral view.
2. Diapl10rus basiniger sp. nov.
(Figs. 24-25) ad, 2pd and I v; hind tibia with I ad and 5 pd. Fore tarsus
without claws, with elongated pulvilli, nearly as long as
Diagnosis. Middle and lower postocular bristles yellow. tarsomere 5; mid and hind tarsi with 2 small claws and 2
Fore coxa yellow. basally narrowly black; mid and hind small pulvilli. Relative lengths of segments of legs LI 4.7:
coxac black; all femora yellow. Abdomen basally partly 2.3: 1.2: 1.0: 0.7: 0.7; LII 5.3: 2.9: 1.5: 1.1: 0.8: 0.7; LIIJ
yellow. 6.9: 2.1: 1.9: 1.3: 0.9: 0.75.
Wing hyaline; veins brown, R4+5 and M parallel api
,\/ale. Body length 3.4 mm, wing length 3.7 mm. cally; CuAx ratio 0.4. Squama yellow, with black hairs.
Head metallic green. with pale grey pollen. Ocellar Halter yellow.
tubercle distinct. Eyes contiguous for a short distance Abdomen metallic green, with pale grey pollen; terga
on frons. with upper ommatidia enlarged: face rather 2-3 yellow, with middle sections of posterior margin
wide with parallel lateral margins. Hairs and bristles on blackish, sterna 1-3 yellow. Hairs and bristles on abdo
head black: middle and lower postocular bristles (includ men black, terga 1-5 with a row of bristles on posterior
ing ventral hairs) pale. Antenna (Fig. 24) black; first margins. Hypopygium (Fig. 25): Sternum 8 with 4 strong
flagellomcrc rather short, I. 7 times wider than long; arista bristles; surstylus with dorsal lobe widest near tip, ventral
black. with basal segment very short. Proboscis black, Jobe with a narrow apical incision, with 2 apical bristles;
with black hairs: palpus yellow, with 6 black hairs and 1 cercus moderately long, and weakly bent basally.
apical bristle.
Thorax metallic green, with pale grey pollen. Hairs Female. Unknown.
and bristles on thorax black: 7-8 in-egularly paired acr,
short and hair-like. 5 strong de. Propleuron with I short Holof)pe male Hebei: Weixian, Baile (920 m), 1964. VJ.
black hair and I longer black hair on upper part, and I 6, Bingqian L1. (CAU)
2 short black hairs and I long black bristle on lower
part. Distribution. China (Hebei).
Legs chiefly yellow; fore coxa yellow, basally nar
rowly black, mid and hind coxae black; all femora yel Ety111ology. The name refers to the black base of fore
low, hind femur \\'ith brown apex (except for extreme coxa.
tip); lore and mid tarsi from tip of tarsomere I onward
brown to dark brown. hind tarsus dark brown. Hair and Remarks. Using the keys of PARENT (1925, 1938) and
bristles on legs black. Fore coxa with 5 bristles on apical STACKELBERG ( 1928), the species runs to D. hojjinann
half: mid co;a with 2 outer bristles; hind coxa with I seggi LOEW from the Palaearctic region. It may be easily
outer bristle. Fore femur with two rows ofv (of which pv separated from the latter by having the fore tibia without
arc stronger): mid femur with I v at base; hind femur long ventral hairs. In D. hofjinannseggi, the fore tibia
apically \~ith 3-4 av. Fore tibia with 1 ad; mid tibia with I bears long ventral hairs (PARENT, 1938).
224 Ding YANG and Patrick GROOTAERT
3. Diaphorus bisetus sp. nov. tarsomere 5, mid and hind tarsi with 2 small claws.
(Figs. 26-27) Relative lengths of segments LI 3.2: 1.8: 0.85: 0.7: 0.4:
0.4; LIJ 4.0: 1.9: 1.2: 0.8: 0.4: 0.3; LTIJ 4.2: 1.3: 1.3: 0.8:
Diagnosis. Postocular bristles wholly black. Palpus dark 0.6: 0.3.
brown to black. All femora black with extreme tips Wing weakly tinged with greyish; veins dark brown to
brownish yellow; all tibiae brownish yellow to yellow. black, R4+5 and M parallel apically; CuAx ratio 0.5.
Wing weakly tinged with grey. Halter black, but blackish Squama pale, with brown margin, bearing black hairs.
with pale knob in female. Halter black.
Abdomen metallic green, with pale grey pollen. Hairs
Male. Body length 2.8-3.3 mm, wing length 2.8-3.3 mm. and bristles on abdomen black, terga 1-5 with a row of
Head metallic green, with pale grey pollen. Ocellar bristles on posterior margins. Hypopygiurn (Fig. 27):
tubercle distinct. Eyes contiguous for a long distance Sternum 8 with 4 strong bristles; surstylus with very
(about half as long as frons) on frons, with dorso-anterior narrow dorsal lobe, bearing a short spine apically, and
ommatidia somewhat enlarged. Hairs and bristles on head wide ventral lobe, with 2 apical birstles; cercus short and
black; postocular bristles (including ventral hairs) black. broad, with some hairs; aedeagus apically thin and
Antenna (Fig. 26) black; first flagellomere rather short, curved.
1.8 times wider than long; arista black, with basal seg
ment rather short. Probo cis dark brown to black, with Female. Body length 2.2-3.2 mm, wing length 2.3-3.0
black hairs; palpus brown, with 5 black hairs and I black mm. Similar to male, but eyes widely separated: palpus
apical bristle. black; wing paler; halter blackish, with pale knob.
Thorax metallic green, with pale grey pollen. Hairs and
bristles on thorax black; 6-7 irregularly paired acr, short Holof)pe male: Yunnan: Menglun, 1999.111. 9 (99083,
and hair-like, 5 strong de. Propleuron with 1 black bristle leg. Patrick GROOTAERT, CAU).
like hair on upper part, and l blackish hair and I blackish
to black bristle on lower part. Paratypes: 4 females from the same locality as holotype
Legs black; all coxae black; all fernora with extreme (IRSN).
tips brownish yellow. Fore and mid tibiae with bases
narrowly brownish yellow; tarsi from tip of tarsomere I Distribution. China (Yunnan).
onward brown to dark brown. Hairs and bri ties on legs
black. Fore coxa with 6 bristles, mid coxa with 2 outer Etwnology. The new species is named after the ventral
bristles and hind coxa with 1 outer bristle. Fore femur lobe of surstylus bearing 2 apical bristles.
with a row of short av on basal part, and a row of long pv,
hind femur apically with 4 av. Mid tibia with I ad and 2 Remarks. This new species is somewhat similar to D.
pd; hind tibia with l ad and 3 pd. Fore tarsus without nigricans MEIGE , but may be separated from the latter
claws, but with 2 elongated pulvilli, nearly as long as by the wing that is weakly tinged with greyish. In D.
nigricans, the wing is dark brown.
4. Diaphorus ce11trijlav11s sp. nov.
(Figs. 28-29)
Diagnosis. Eyes separated on frons. Middle and lower
postocular bristles pale. Arista with sparse long hairs.
Fore femur yellow; mid femur black with apical 1/3
yellow; hind femur yellow, with base and apex black.
Hind femur with two rovvs of rather long ventral hairs on
basal half. Abdomen partly yellow basally.
Male. Body length 5.1-5.7 mm, wing length 4.7-5.3
mm.
Head metallic green, with pale grey pollen. Ocellar
tubercle distinct. Eyes separated on frons; width of frons
at narrowest point distinctly greater than width of median
ocellus; face rather wide, with parallel lateral margins.
Hairs and bristles on head black; middle and lower
postocular bristles (including ventral hairs) pale. Antenna
Figs. 26-27 - Diaphorus bise111s sp. nov .. male. 26. antenna (Fig. 28) black; first flagellomere brownish, rather short,
(excluding scape and pedicel), lateral view: 1.8 times wider than long; arista black, with basal seg
27. genitalia. lateral view. ment very short, with sparse long hairs. Proboscis black,
