Studies on the darkling beetles (Coleoptera: Tenebrionidae) known from Grand Bahama Island, with descriptions of new species of Branchus and Adelina

2005·9.6 MB·

by  Warren E Steiner

PROC. ENTOMOL. SOC. WASH.
107(2). 2005, pp. 441-459
STUDIES ON THE DARKLING BEETLES
(COLEOPTERA: TENEBRIONIDAE) KNOWN FROM
GRAND BAHAMA ISLAND, WITH DESCRIPTIONS OF NEW SPECIES OF
BRANCHUS AND ADELINA
Warren E. Steiner, Jr.
Department ofEntomology, NHB-187, Smithsonian Institution, Washington. DC 20560,
U.S.A. (e-mail: [email protected])
—
Abstract. An annotated checklist of the darkling and comb-clawed beetles (Coleop-
tera: Tenebrionidae) of Grand Bahama Island is given, with observations on habitats,
biology, and biogeography. More than 55% are new records for the Bahamas and some
others are new island records. Branchus saxatilis Steiner, new species, and Adelina
maryjoae Steiner, new species, are described and illustrated. Nantes viridiiiucai}s (Horn
1878), described from Tampa, Florida, is placed as a new synonym under Nantes azur-
escens (Jacquelin du Val 1857), described from Cuba. Threats to some species via deg-
radation ofthe native maritime scrub habitats are discussed. Ofthe 31 species now known
from Grand Bahama, 25 also occur in Florida, and a subset of 18 of the Florida species
also are known from Cuba. Five of the species are known or suspected to be ad\enti\e.
Key Words: Bahamas, Casuarina, endemic insects, introduced species, island biogeog-
raphy, new synonymy, threatened habitats
Systematic studies on the darkling bee- surveys have been done on only a few is-
tles (Coleoptera: Tenebrionidae) ofthe West lands, and systematic studies have focused
Indies are proving to be of great value primarily on Lepidoptera and Hymenoptera
toward increased understanding of the pat- (Elliott 2003). Only 28 species of Tene-
terns of island biogeography of the Carib- brionidae are documented as occurring in
bean region. My interest in this group of the Bahamas (Steiner in press) but in the
insects and the distributions of adventive short time spent collecting these beetles on
and endemic species on islands, after two Grand Bahama. 30 species were dt>cument-
visits to Grand Bahama Island, led to this ed; most represent new disiribuiitMi records
study. Similar treatments of island faunas for the Bahama Islands, and {\\v> are newly
are planned for future research in the Ba- described in this paper Obser\alions on the
hamian region, in order to document the en- biology (including excerpts from licld
demicity and adventive elements in these notes) and known distribution of each spe-
islands, and assist in enrichment of the Ba- cies are given for the nev\ material, and
hamian National Insect Collection and of other records in the literature aie noietl.
other institutions. West End, Grand Bahama Island lies
While identifying the available speci- about 100 km east of the Florida Peninsula
mens and reviewing the literature, it be- at latitude 26°N; the elongate island extentls
came apparent that very little is known of eastward approximatel\ 140 km and has a
the Bahamian beetle fauna. Biodivcrsitv total land area o\' I.35(i km . Ii is suiicnnul-
442 PROCEEDINGS OF THE ENTOMOLOGICAL SOCIETY OF WASHINGTON
ed by other Bahamian islands and small Table 1. Gazetteeroflabel localitiesforTenebrion-
cays to the north, east and south at varying idae ofGrand Bahama Island.
distances and these islands have a great
range in size. The nearest other island of
comparable size is Abaco, arcing around Bootle Bay Village 26°39'N, 78°56'W
Eight Mile Rock 26°3rN, 78°47'W
and east of Grand Bahama's eastern end Freeport 26°30'N, 78°4rW
and separated from it at one point by only Garden ofthe Groves 26°32'N, 78°30'W
about 20 km. Abaco, Grand Bahama, and Holmes Rock Village
their associated offshore cays are all part of (5 km NW) 26°36'N, 78°52'W
the Little Bahama Bank (Shattuck and Mill- Lucaya (beach) 26°29'N, 78°37'W
Lucaya (19 km ENE of) 26°34'N, 78°26'W
er 1905), which was a single large island McLean's Town 26°39'N, 77°59'W
during lower sea levels of the Pleistocene West End 26°42'N, 79°00'W
(Sealey 1994). For these reasons, Grand Xanadu Beach 26°29'N, 78°42'W
Bahama and Abaco would be expected to
have similar insect faunas (Browne et al.
1993). While closer to its neighboring lands (Correll 1979) for several guilds of geo-
during that period, there was no land bridge philous, lignophilous and fungivorous
between the Florida peninsula nor the Great Tenebrionidae. However, native maritime
Bahama Bank ("Paleoprovidence"). Ofthe scrub of the southern strand has in most ar-
two primary types of islands (Gillespie and eas been severely altered with the invasion
Roderick 2002), Grand Bahama can be con- of Casuarina equisetifolia L. and related
sidered a "Darwinian" island in that sense species (Hammerton 2001) with resulting
as well as a "fragment" island in the other, impacts on beetle ocurrences in such habi-
because it has separated from a larger land tats noted (Steiner 1991, in press).
mass since the Pleistocene.
Methods
The natural vegetation of the island
interior is forested, with the dominant tree Many of the specimens reported here
being Caribbean pine (Pinus caribaea Mo- were taken in June 1987 (8 days of col-
relet) on a rugged karst terrain which is no- lecting effort) on the south side ofFreeport,
where elevated more than a few meters at fluorescent lights around a building that
above sea level (highest point less than 21 was located next to forested land, and by
m). Thickets of Sabal palmetto (Walt.) operation of black lights on several
Lodd. ex JA & JH Schultes form much of evenings near this site. One Malaise trap
the understory, mixed with various shrubs; and several yellow pan traps at forest edges
large hardwood species are uncommon, but were also used at this locality. Various mi-
this may be the result of the historical har- crohabitats were investigated with hand-
vest of wood. The northern coast of Grand collecting techniques, at this and other lo-
Bahama is irregular, with mangrove inlets calities as noted under each species record
and cays. The southern coast has beach and below. Specimen label localities and their
dune formations of varying width, slope, coordinates are listed in Table 1. All labels
and sand composition. The calcareous sand from the June 1987 collection read
deposits of the western Bahamas provide a "GRAND BAHAMA ISLAND" (first
mosaic of differing substrate deposits and line), followed by the locality and date (giv-
textures due to storm action and sea level en under each species listing, below) and
fluctuation (Multer 1977, Sealey 1994) and ending with (collectors) "W. E. Steiner, M.
this provides a dynamic mixture of micro- J. & R. Molineaux." October 1995 (3 days
sites for colonization by geophilous beetles. of collecting effort) specimens are labeled
With the combination of coastal soils and similarly but have coordinates of the local-
interior forest, the island offers habitats ity given, and end with "coll. W. E. Steiner
VOLUME NUMBER
107, 2 443
& J. M. Swearingen." Label data on type tion). In addition, the BNIC. Nassau, cur-
material, and the few other specimens from rently holds mostly Lepidoptera.
other sources, are spelled out in full. Spec- Hymenoptera, Orthoptera, and aquatic in-
imens are deposited in the collections ofthe sects.
National Museum of Natural History,
Smithsonian Institution, Washington, DC EpitrNciWi^ocles tomentosiis (LeConte)
(USNM), the Bahamian National Insect •'5 km. Holmes Rock Village. 24 June
1987"
Collection, Nassau (BNIC), and other insti- (1).
tutions as noted in the specimen records. This unique female was found by Jenni-
A search for additional material in mu- fer Molineaux "at top of dune, under a
seum collections leading up to this study white shell" and other field notes describe
was made, but was largely unsuccessful (as the beach as "fairly narrow and sloped,
discussed below). Literature records were with a steplike slip-face at dune edge; an
also searched. elevated rolling dune area fairly broad, and
stabilized with trailing grasses, Ipomoea,
Results and succulents. Behind this and down in
The checklist (Table 2) of known Tene- slack area was an abrupt dense scrub ofold
brionidae from Grand Bahama Island in- Coccoloha\ no Australian pine here yet."
cludes 31 species representing 7 subfami- Except for a recent listing for "Bahamas"
lies and 15 tribes as presently recognized (Peck and Thomas 1998) this beetle was not
(Aalbu et al. 2002). Annotations given previously known outside ofthe continental
below for each of the species follow this USA (Freude 1968). This was an unex-
sequence. The majority of species are con- pected occurrence, but the species is
sidered to be indigenous to the island and winged and does occur along similarbeach-
the region, but three are identified as being es, barrier islands and sandy areas along the
introduced from outside the region and two southern Atlantic coast; larvae live in sandy
are probably recent arrivals from adjacent soils (Hoffman et al. 2003; Steiner 1988.
land areas; six are evidently endemic to the 1995, unpublished data). Compared with
Bahama Islands. Most are new island individuals from Florida, the specimen is
larger than average and more robust with
records and the first reported for the Ba-
hamas; in many cases they represent a larger, denser punctures and setae of the
range extension from some adjacent area, dorsal surface. Two subspecies are recog-
principally Florida. Few Grand Bahama nized and separated on such differences
specimens and literature records were (Freude 1968) and it is possible thai the
Bahamian form represents a third, hui more
found, probably because of the historical
lack of focus on this group in the archipel- material will be needed to determine its
distinctness. M. A. Ivie (personal commu-
ago (Steiner, in press), and the relatively
nication) has seen a specimen from ihc
little general work by entomologists on this
island. A relatively low number of Ceram- Bimini Islands labeled "South Bimini Is!..
Bahamas, B.W.I. March 22-25 1958. A.
bycidae are recorded (Browne et al. 1993) .
M. Nadler," determined by C. A. Triple-
from Grand Bahama, larger than some
horn and in the collection of American
islands with greater richness documented, Museum of Natural History. This prohahl\
illustrating the lack of comparable collect- is the source of the Bahamian recoid listed
ing there. Perhaps the largest known Grand by Peck and Thomas 1998).
Bahama insect collection is that of D. J. (
MacDonald. kept at the Rand Nature Cen- Branchus saxatilis Steiner, new species
tre, Freeport (Elliott 2003), but a family- (Figs. 1-3A-D)
level inventory did not list any Tenebrion- The occurrence ol a Hrnnchus on Grand
idae (N. B. Elliott, personal communica- Bahama was expectetl since incnilicis ol'ihe
444 PROCEEDINGS OF THE ENTOMOLOGICAL SOCIETY OF WASHINGTON
Table 2. Checklist of Tenebrionidae known from Table 2. Continued.
Grand Bahama Island. Classification follows that of
Aalbu et al. (2002). Abbreviations: A, adventive; B, Alphitobiini
new island record but previously known from the Ba- 23. Alphitubius diaperinus Panzer—A, N; FL+CU
hamas; N, new record for the Bahamas; E, apparently
endemic to the Bahamas; P, previously reported from Amarygmini
the island; FL and CU. also known from Florida and/ 24. Cymatuhes tristis (Laporte)—N, FL+CU
or Cuba. Refer to the text on each species for more
distributionaldata, specific informationanddiscussion. Alleculinae
Alleculini
—
Pimeliinae 25. Lobopoda nesiotica Campbel—l P, E
Epitragini 26. Hymenorus densiis LeConte P; F—L
1. Epitragodes tomentosus (LeConte)—N; FL 2287.. HHyymmeennoorruussfbaarhriamCeanmspibselClam——pbNe,lAl; FP,L+ECU
Branchini 29. Hymenorus convexus Casey P; F—L+CU
2. Branchiis saxatilis Steiner, n. sp.—N, E 30. Hymenorus transversus Campbell B, E
Coelometopinae
Diaperinae —
31. Glyptotus cribratus LeConte P(?); FL
Phaleriini
—
3. Phaleria picipes Say B; F—L+CU
4. Phaleria piincdpes Le—Conte P; FL+CU
5. Phaleria testacea Say B; FL+CU genus occur in southern Florida (Triplehorn
Diaperini and Weems 1964) and on New Providence
—
6. Adelinaplana (Fabricius) N; FL+CU (LeConte 1866) and Cuba (Spilman 1961)
7. Adelina bidens (Schaeffer)—B: F—L+CU and specimens from otherBahamian islands
8. Adelina maiyjoae Steiner,—n. sp. N, E(?) had been seen by me. After extensive
109.. DPilaapteyrdiesmamaecixiclaavtaatuOlmiv(iSeary)—B;N;FLF+L—C+UCU search in the most likely habitats (Steiner
11. Platydema nigratum (Motsch—ulsky) N; FL+CU 1991), a single female specimen was found
12. Platydema nificorne (Sturn)—N; FL at Eight Mile Rock, with associated larvae,
13. Platydema nificorne (Sturn) —N; FL on the first visit in June 1987. The beetle
14. Neomida bicornis (Fabricius) B; FL+CU was distinct from any of the neighboring
Crypticini forms, but more specimens were needed to
—
15. Gondwanociypticiisplatensis (Fairmaire) A, N; wanant a description. This prompted the re-
FL turn to the site in October 1995, and it
Hypophloeinae — proved successf—ul.
16. Corticeus thoraciciis (Melsheimer) N; FL Description. Holotype, male (Figs. 1-
Opatrinae 3): Body color very dark brown, outline
Opatrini oval, nearly continous except for small in-
—
17. Blapstiniisfortis LeConte N; —FL+CU dentation between posterior angle of pron-
18. Diastolinus bahamae Marcuzzi P, E(?) otum and elytral humerus; form convex,
about equally so dorsally and ventrally;
Platynotini mm
19. Alaetrimispullus (Sahlberg)—N, A(?); FL+CU body length 12 from anterior angle of
pronotum to elytral apex, greatest width 7.2
Leichenini — mm at basal Vs of elytra; dorsum dull, cov-
20.N;LeFiLc+heCnUwn canaliculatum variegatum (Klug) A, ered with fine, decumbent, pointed and ta-
pered, golden brown setae.
Tenebrioninae Head less than Vj as wide as pronotum,
Helopini
— widest at eyes and equally so at epistomal
21.FLNa+itCtUes azurescens Jacquelin du Val N; canthi; frons with a triangular concavity
across middle. Antenna with segment 3
Triboliini slightly shorter than combined length of
22. Tharsiis seditiosiis LeConte- -N; FL segments 4 and 5; segments 9, 10 and 11
VOLUME 107, NUMBER 2 445
^^^^
Fig. 1. Branclms saxatilis. lioliHype d. dorsal liahiuis. l.cnylh.
446 PROCEEDINGS OF THE ENTOMOLOGICAL SOCIETY OF WASHINGTON
kw^'^m^
wider than long, forming a weak club.
Mentum somewhat heart-shaped, without
sharp angles; surface flat, punctate, setose.
Gena slightly produced anteriorly, not ex-
tending to half the length of mentum.
Prothorax about twice as wide as long,
broadest at basal Vs, sides evenly arcuate,
anterior margin broadly and evenly emar-
ginate, anterior and posterior angles pro-
duced, the latter with rounded, flattened
apices directed posteriorly; lateral margin
very slightly explanate, without a polished
bead; pronotum evenly convex, surface
with shallow rounded punctures, some con-
tiguous, each bearing a flattened scalelike
seta extendingjust beyond posterior margin
of puncture; punctures absent along a nar-
row smooth midline and on very small,
slightly raised areas on middle of each side
of disk; ventral surfaces more sparsely
punctate with setae slender, hairlike, and
not as flattened or decumbent. Fig. 2. Branchiis saxatilis, holotype cj, detail of
Elytron widest near basal -y<;"'% about 2.5 elytral surface including suture. Length of setae, ca.
0.11 mm.
times longer than wide; dorsal surface gen-
erally smooth except for basal plicae (Fig.
1) and poorly defined rows of large deep metatibia arcuate. Tarsi with conspicuous
punctures, mostly confined to basal %; golden setae on ventral surfaces, especially
scalelike setae smaller and more decurved on pro- and mesotarsomeres 1-4.
than those on pronotum, arising from very Tegmen (Fig. 3A-D) with apical piece
inconspicuous punctures, distributed evenly slightly longer than basal piece, flattened
or in slightly more dense patches but with and truncate at apex, sinuate across apex
gaps around the large punctures (Fig. 2). with slight asymmetry between small,
Margin ofpseudepipleuron moderately well sharp, lateral projections. Median lobe with
defined but not sharp or beaded; scalelike a slender arching rodlike apex, ending with
setae more dense than on elytral disk. Epi- a slightly bulbous tip.
pleuron long and tapered to elytral apex, Female: Similar to male but larger, 13-
mm
generally %"" as wide as pseudepipleuron 14 long and more robust, inflated. Sec-
but abruptly widened at base. ondary sexual differences include lack of
Sternites somewhat polished, with seti- the arcuate form ofthe hind tibia, much re-
ferous punctures on most areas but smaller, duced setose flat ventral surfaces on the
not as dense, especially sparse in median meso- and metatibiae, and more convex ab-
areas of abdominal sternites 1-4 which are dominal ster—na.
smoother, shining. Legs with scalelike setae Variation. The largest of the 5 males is
mm mm
especially on tibiae; more hairlike on fem- 12.3 long, the smallest is 11.5
ora and relatively dense on flat ventral sur- long. Some specimens have a soil encrus-
faces of meso- and metatibiae; tibial spurs tation that obscures some of the punctures
well developed. Protibia broad and truncate and setae. —
at apex, forming a tooth at outer angle; Type data. Holotype 6, A 6 paratypes
meso- and metatibiae expanded at apex; and 1 ? paratype: "GRAND BAHAMA
—
VOLUME NUMBER
107, 2 447
Fig. 3. Branchus saxatilis, holotype d, genitalia. A, Tegmen, dorsal view. B, Tegmen and median lobe,
lateral view. C, Apicalpiece, dorsal view. D, Apical halfoftegmen and median lobe, ventrolateral view. Length
oftegmen, 5.3 mm.
ISLAND, Eight Mile Rock, 26°3rN, (Steiner 1991) thai includes the type spe-
78°47'W, 25 Octoberl995, coll. W. E. cies, B. floridanus LeConte (1866), illus-
Steiner & J. M. Swearingen;" 1 9 paratype, trated by Triplehorn and Weems (1964)
same data except "26 June 1987; W. E. from southern Florida, and B. wooili Le-
Steiner, M. J. & R. Molineaux" and 1 S Conte (1866) from New Providence, and
paratype, "Abaco Cays, Allans Cay, May several other species to be described. All oi
9, 1953/Van Voast-A.M.N.H. Bahama Isls. the members of this group ha\e the same
Exped., Coll. E. B. Hayden." The holotype distinctive form of the male genitalia, with
and 4 paratypes are deposited in USNM; minor variations; the external characters are
two paratypes, in BNIC, and the Abaco more useful for recogni/ing ihe species, in
paratype, in the American Museum of Nat- particular the details o^ the scale-like cl\tial
ural History, N—ew York. setae. These are very short, sparse and in-
Etymology. The specific name comes conspicuous in B. JloriiUimis, narrow, line
from the Greek word ""saxatilis'^ meaning and evenly scattered in B. woodi: the latter
"of the rock," in reference to the name of are generally smaller beetles, and neither
the type locality. Eight Mile Rock. The species has the large, deep, elytral punc-
coastal strand of beach at the locaHly is ttnes seen in B. \ciMiii/i\. Brmiilnis suMiiilis
characterized by a ledge of coral rock on appears to be endemic to islands of the Lit-
which the habitat of these beetles exists. tle Bahama Bank, but is most closelv relat-
Diagnosis and relationships. Bnincluis ed to its neighboring congeners in llorida
saxatilis belongs to the ""floriddiiiis grotip"" and islantis o\' the (neat Bahama Bank. A
448 PROCEEDINGS OF THE ENTOMOLOGICAL SOCIETY OF WASHINGTON
key to Brdnchus species will be provided by these trees, or had been altered or lost
in a future—monograph of the group. by construction of buildings and roads. The
Biology. At the type locality, digging threats to native biota by the dominance of
by hand in coarse sand among low shrubs the introduced Casuarina spp. are severe
led to the discovery of several large larvae, (Hammerton 2001) and Branchus species
later confirmed as belonging to Branchus. may be the most threatened of maritime
This preceded the finding of the first adult scrub insects because of their habitat re-
beetle, as described by me in field notes on strictions (Steiner 1991, in press). Because
26 June 1987: "Found a sma—ll pull-off at Branchus beetles were searched for at all
beach front on a rocky ledge no beach at coastal sites visited, but found on Grand
the surf line here, but rugged coral rock + Bahama only at the type locality, B. saxa-
pounding waves; dune sand was on upper tilis may be of conservation concern. Its
part ofcoralbedrock, however, + had a low status on Abaco is unknown at present.
shrub zone, with no Casuarina. The large
Phaleria picipes Say
black Blapstinus [= Diastolinus bahamae]
common here at edge of shrub patches un- "Bootle Bay Village, 24 June 1987" (7).
der drift boards + leaf litter; associated lar- These specimens were among the larger
vae in sand a few cm deep. Dug deeper in
series of P. testacea listed below; the two
loose sand under a—piece of scrap lumber + species often co-occur. My field notes de-
found a big larva looked like Branchus
scribe "a well developed step-like beach of
but—larger than any B. larvae from Flori- more coarse coral sand" and beetles taken
da kept digging around this local area at
"in moist sand under seaweed drift mats
edge + under low spreading shrubs, finding
recently washed in." Species of Phaleria
more larvae in different sizes but most as
are restricted to coastal beach sands where
large as the P'; after about half an hour,
they feed on drift debris; this species and
excavated a single 9 adult Branchus, about
4-5 cm in sand, under a single layer of its two congeners listed below are wide-
spread in the Caribbean region and highly
dead leaves in shade of low shrub, in
variable in size and coloration (Triplehorn
among sticks + roots. Sand cool + dry,
1991, Triplehorn and Watrous 1979, Wa-
loose, + mixed with dark organic parti-
trous and Triplehorn 1982). The above
cles." On the return visit to this site eight
specimens range from a uniform dark
years later, October 1995, adult beetles brown to a yellowish tan color; elytra are
were more easily found, not as deep in sand
sometimes more pale than the pronotum
but under leaf litter that was wet from re- and head. Phaleria picipes is known from
cent rains; only one half-grown larva was
the other Bahamian islands ofSouth Bimini
found at this time. Known larvae of several and Rum Cay (Triplehorn and Watrous
Branchus species are to be described in a
1979).
future work.
This site was unique in being free of Phaleria punctipes LeConte
shade from Casuarina trees, presumably "5 km. NW Holmes Rock Village, 24 June
because the shallow sand on the rock ledge
1987" (3); "Lucaya (beach), 25 June
has prevented their establishment, but ad- 1987" (4); "19 km. ENE Lucaya, 25 Oc-
jacent to this section of coast was a dense
tober 1995" (1); "McLean's Town, 26
stand of old Casuarina, typical of most of
October 1995" (1); "Xanadu Beach, 21
the shoreline on the southern strand.
June 1987" (24), "23 June 1987" (3).
Searches for Branchus specimens at all oth-
er sites visited were not successful; the For a flightless species, P. punctipes is
dune crest and scrub vegetation behind the surprisingly widespread on many islands
beach front in all other sites was shaded out (see papers cited under P. picipes) includ-
VOLUME NUMBER
107, 2 449
ing small ones, e.g.. Pigeon Cay near An- Adelina hidens (Schaeffer)
dros (Anderson 1996). Beetles and larvae "19 km. ENE Lucaya. 25 October 1995"
are found under washed-up sea drift that is
(3).
generally more dry and higher on the beach
than that used by P. testacea and others, Specimens were found co-occurring with
e.g., as noted for the Xanadu Beach series: the two A. plana cited above "under bark
"under dry drift piles on a higher plateau of fallen Casuarina" in a coastal forest
of sand above normal high tide, and we dominated by that tree; "Casuarinas domi-
found a concentration of them—in dry loose nant but many dead, standing." The species
sand but where sand was moist 3—4 cm be- is not as widespread as A. plana but was
low surface. Some were even up at edge of reported from South Bimini (Vaurie 1952)
beach grass and stabilized zone, and were and is also recorded from Cuba and Florida
found next to the Blapstinus.'' (Ardoin 1977, Peck and Thomas 1998): Ar-
doin (1977) also listed the Dominican Re-
Phaleria testacea Say public and Guatemala.
"Bootle Bay Village, 24 June 1987" (48); Adelina maryjoae Steiner, new species
"Lucaya (beach), 25 June 1987" (13). (Figs. 4A-G)
These were at first misidentified as P. pi- This distinctive species is known only
cipes (in field notes) because the mixed col- from the holotype. It is different from all
oration of Bahamian specimens is more other species in the genus in having a con-
typical ofthat species. Grand Bahama spec- spicuous, long basal antennomere or scapus
imens range from yellowish brown to me- (Figs. 4A-C). Ardoin (1977) recognized 18
%
dium brown and about 10 are bicolored species from the Americas and two others
(elytra mostly brown with a lateral stripe have been described since then (Triplehorn
and basal band of yellow). The series from and Ivie 1983,—Doyen 1984).
Lucaya was found with P. piinctipes "on Description. Holotype. male (Figs. 4A-
and in sand under seaweed drift mats along F): Length (from clypeal margin to elytral
recent high tide line, upper part of wide, apex) 6 mm.; width (across middle of
coral-sand beach." elytra) 2.4 mm.; greatest thickness (at
metasternite) 0.7 mm. Body form very flat,
Adelina plana (Fabricius) elongate, parallel sided; surfaces smooth,
"Eight Mile Rock, 26 June 1987 / Under shining; color reddish brown. Head hnel\
bark ofdead Casuarina'' (11); "Freeport, punctate, nearly twice as wide as long, wid-
24 June 1987" (1), "26 June 1987" (1), est at laterally expanded epistomal canihus:
"27 October 1987" (14); "19 km. ENE anterior margin with an undulate appear-
Lucaya, 25 October 1995" (2). ance; area of frons between eyes slightly
concave, then anteriorly with an abrupt de-
This beetle is widespread in the Neotrop- clivity, with three shallow conca\ities. one
ical region and reported from Cuba (Ardoin median and others lateral to it. Labrum very
1977) and Florida (Peck and Thomas small, setose; membrane at base not visible.
1998). They are attracted to lights and I Antenna long, reaching beyond basal '4"' of
have found them associated with larvae un- elytron if folded back along body; scapus
der dry thin bark of dead standing or re- enlarged, clavate. nearly as long as head,
cently fallen wood, not rotten, in semi- setose on anteriiM' side; pedicelliis small.
shaded sites. Notes on the specimens of 27 rounded; antennomeres 3 aiul 4 clavale.
October read "series of small Adelina + 2 about twice as long as wide, with setae
assoc. larvae under tight bark of cut logs, around widest area near apex: antennom-
probably Acacia or related legume." eres 5-10 c<\ similar I'dini. abtuil 3 limes as
450 PROCEEDINGS OF THE ENTOMOLOGICAL SOCIETY OF WASHINGTON
Fig. 4. Adelina maryjoae, holotype 6. A, Dorsal habitus. B, View of frons. C, Dorsal view of pronotum
and head. D, Front leg, right, posterior view. E, Tegmen, dorsal view. F, Tegmen, lateral view. Length ofbeetle,
6 mm; tegmen, 1.4 mm.