DIPTERA FROM NEPAL 45 



LISSODROSOPHILA gen. n. 



Type-species, Lissodrosophila longicornis sp.n. (Nepal). 



Eyes vertical. Arista without ventral branches below fork, dorsal branches long. Front 

 broad, glossy, smooth. Periorbit very broad, reaching anterior margin of front. Orbitals two, 

 both proclinate, without reclinate orbitals. Postverticals minute. Mesonotum very convex, 

 glossy. Scutellum matt, short. Two long sternopleurals, one humeral, one supra-alar. Acro- 

 stichal hairs in two rows. Only one pair of dorsocentrals. No prescutellars. Alula and anal 

 vein abbreviated. 



Related to the genus Lissocephala Malloch, 1929, in having a smooth, glossy, and 

 flat front, small postverticals, shining convex mesonotum, dull scutellum, no anal 

 vein, and no row of spinules on fore femur. Differs from Lissocephala in having no 

 reclinate orbitals, no ventral branches of arista, only one pair of supra-alars, two rows 

 of acrostichal hairs, and only one pair of dorsocentrals. 



Lissodrosophila longicornis sp. n. 



(Text-figs. 119-122) 



o*. Body about 1-5 mm. Head dorsoventrally elongated, much broader than thorax, 

 anteriorly protruded at antennal base. Eyes vertically elongate, ventrally narrowing, deep 

 purplish brown, bare. Antennae very large and long ; first segment black, longer than broad ; 

 second black, distally broadened, rectangularly articulated to the first ; third matt black, with 

 grey pubescence, about four times as long as broad, distally tapering. Arista with about seven 

 dorsal long branches and a small terminal fork. Palpus club-shaped, yellow, subapically with a 

 few black setae. Ocellar triangle dark brown, glossy. Periorbit very broad, reaching anterior 

 margin of front, glossy deep brown. Postverticals minute. Front glossy deep brown, smooth, 

 anteriorly one-third broader than length down middle, posteriorly more than half as broad as 

 head width. A few frontal hairs present. Clypeus dark brown. Face narrow, deep glossy 

 brown, buccal margin pale and much protruded upward. Carina absent. Cheeks narrow, 

 yellowish brown, pale at eye margin, about one-ninth as broad as the greatest diameter of eye, 

 black above. Occiput deep brownish black. Mouth-parts deep brown, robust and long. 

 Anterior proclinate orbital long and upright, posteriors minute. A few short orals ; vibrissa 

 somewhat longer than other orals. 



Mesonotum black, shining blue-green, convex, with thick grey pubescence. Scutellum velvety 

 black, much shorter than broad, posteriorly grey pollinose. Thoracic pleura dark brownish 

 black, glossy, somewhat blue-green. Dorsocentrals near the caudal end of scutum. Anterior 

 scutellars divergent, about two-thirds as long as posteriors ; posteriors longer than dorsocentral, 

 parallel, twice as far from each other as from anteriors. A small marginal hair between anterior 

 and posterior scutellars. Sterno-index about 0-7. Legs mostly brownish black ; femora 

 darker ; all metatarsi much longer than the other segments together. Preapicals on all legs ; 

 apicals prominent on mid leg. Wings hyaline, tip rounded, veins yellow. Alula black, small, 

 without fringe. ^? 2 +3 strongly curved to costa at tip ; R 2 + 3 and M parallel ; posterior crossvein 

 curved outward ; anal vein absent. C-index about 1 -8 ; 4V-index about 2.0 ; 4C-index about 

 1-3 ; 5x-index about 12 ; Ac-index about 31. Ci-bristles two ; C3-fringe on basal half, 

 sparse. Halteres white, stalk black. Abdominal tergites glossy black, shining metallic green, 

 broader and shorter than thorax. Genital arch narrow, setigerous ; clasper oval, setigerous 

 and pubescent ; anal plate elliptical, setigerous and pubescent. Phallic organs not examined. 



Holotype <$. East Nepal : Taplejung District, below Sangu, by stream in 

 shady ravine, c. 6,000', 30.X.1961 (R.L.C.), BMNH. 



