(Proceedings submission caseby-case

DEUVE ET AL.: CARABID BEETLE FAUNA OF THE GAOLIGONG MOUNTAINS 347
6(5’) Right mandible with the anterior point of the retinaculum free and displaced distally to form
a separate tooth; elytra without or with up to two discal setae, elytral surface with or without
iridescence. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
6’ Right mandible tridentate, but premolar tooth fused with the retinaculum to form a trifid
molar with the anterior point not displaced distally; elytra with two or three discal setae;
elytral surface not iridescent . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Trechus Clairville
7(6) Tempora pubescent; size small, BL less than 3.8 mm; pronotum with basal angles obtuse and
rounded; elytra without (in T.asetosa) or with only a single discal seta near stria 3. . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Trechepaphiopsis gen. nov.
7’ Tempora glabrous; size larger, BL more than 4.0 mm; pronotum with basal angles sharp and
rectangular; elytra with either two discal setae or none . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
8(7’) Elytra with two discal setae near stria 3, elytral disc slightly flattened along the length of the
median suture. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Epaphiotrechus gen. nov.
8’ Elytra without discal seta, elytral disc evenly convex. . . . . . . . Trechepaphiama gen. nov.
Genus Perileptus Schaum, 1860
Perileptus Schaum, 1860:663.
TYPE SPECIES.— Carabus areolatus Creutzer, 1799.
DIAGNOSIS.— Adults of this genus (Figs. 5a, 6a) can be recognized by the following combination
of character states: size small to medium (BL = 2.0 to 3.5 mm), fully winged, dorsal surface
covered with more or less long pubescence; eyes large, convex, pubescent; frons flat, frontal furrows
wide and deep, attenuated posteriorly; terminal palpomeres slender, attenuated apically; mentum
free, not fused with submentum; submentum with 10 or 12 setae; antennal scape distinctly
pubescent; pronotum narrowed basally, with base broadly projected posteriorly, median longitudinal
furrow deeply and sharply defined; elytra elongate and flattened, recurrent stria indistinct; legs
short, protibiae without longitudinal furrows.
GEOGRAPHICAL DISTRIBUTION.— Perileptus is a moderately diverse genus with about 50
described species arrayed in four subgenera (Lorenz 2005). It is represented in the Palearctic, Oriental,
Afrotropical, Australian and Neotropical Regions. The study area is within the previously
known range of this genus.
Key for Identification of Adults of Perileptus Species of the Gaoligong Shan Region
1. Body size larger (BL = 2.6 to 2.8 mm); body color reddish, apex of the elytra darker; pronotum
distinctly convex, with sparse setiferous punctures, basal angles markedly projected laterally;
elytra smooth, shiny, microsculture effaced, discal striae coarsely punctuate. . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Perileptus imaicus Jeannel
Body size smaller (BL = 2.3 mm), body color pale yellowish brown, elytra concolorous;
pronotum less convex, with dense setiferous punctures, basal angles less projected laterally;
elytra dull, irregular isodiametric microsculpture evident, discal striae distinctly but finely
punctuate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Perileptus pusilloides sp. nov.
Perileptus imaicus Jeannel, 1923
(Figs. 5, 35a, 45–48)
Perileptus imaicus Jeannel 1923. Lectotype, here designated, a male, in BMNH, labeled: “Lectotype” [red
label];/ “w. Almora, Kumoan U.P., India H.G.C.”/ P. imaicus Jeannel det.”/ “H.E. Andrewes Coll., B.M.