DIPTERA FROM NEPAL 53 



about half as long as face. Cheeks brownish black, grey along eye margin, two-sevenths as 

 broad as the greatest diameter of eye. Occiput black. Anterior reclinate orbital minute, 

 equally distant from posterior reclinate and from proclinate ; proclinate slightly inside others 

 and shorter than posterior reclinate. Second oral about two-thirds as long as vibrissa. 



Mesonotum usually brownish black, glossy, without punctures. Scutellum velvety black. 

 Thoracic pleura dark brown, darker below and caudally. Three humerals. Acrostichal hairs 

 in about six rows. Distance between anterior and posterior dorsocentrals about three-fifths 

 distance between anterior pair ; anterior dorsocentrals about two-thirds as long as posteriors. 

 Anterior scutellars divergent ; posteriors twice as long as anteriors, equidistant from each other 

 and from anteriors. Sterno-index about 05. Legs dark yellow ; fore and mid coxae and 

 basal two-thirds of fore femur black ; hind coxa and trochanter yellowish white. Front and 

 hind metatarsi subequal to the next three segments together, mid metatarsi subequal to the 

 remaining segments together. Preapicals on mid and hind legs ; apicals strong on mid leg. 

 Wings comparatively large, somewhat fuscous, crossveins clear. #2+3 gently curved to costa 

 at tip ; i?i+ 6 and M nearly parallel. C-index about 1 1 ; 4V-index about 1 q ; 4C-index about 

 16 ; 5x-index about 20 ; Ac-index about 4-5. Ci-bristles two, lower weaker. C3-fringe 

 sparse, on basal two-fifths. Halteres yellow. Abdominal tergites glossy black, somewhat 

 purplish. 



Periphallic organs : Genital arch dark brown, rather narrow, posterior margin setigerous, 

 dorsally and ventrally only moderately narrowed, ventral tip rounded ; heel low, angular, 

 somewhat curved upward ; toe only slightly swollen. Anal plate yellowish brown, elongate, 

 setigerous, basal margin dark. Clasper yellow, crescentric, projecting below genital arch, 

 outer margin with a concave row of about nine black pointed teeth, the row not reaching 

 ventral tip of clasper, and with a stout black submedian bristle. Decasternum large, yellowish 

 brown, triangular. Phallic organs : Aedeagus dark brown, medially yellowish brown, fusiform 

 in ventral aspect ; basal apodeme slender, slightly longer than aedeagus. PI = 12. Anterior 

 paramere small, conical, subapically with a few sensilla. Posterior parameres apparently fused 

 to decasternum. Ventral fragma V-shaped, hypandrial plate yellowish brown, apically with a 

 stout yellow submedian spine, p.f. = aBCdEfgHIklm'N. Egg-guide lobe yellowish orange, 

 proximally darker, tip obtusely pointed, mediodorsally much swollen, with about twenty 

 marginal and four discal yellowish brown teeth. 



Holotype <$. East Nepal : Taplejung District, Sangu, mixed vegetation by 

 stream in gully, c. 6.200', xi. 1961-1.1962 (R.L.C.), BMNH. 



Allotype $. Same data as holotype {R.L.C.), BMNH. 



Paratypes : 4 <J, 4 $, Taplejung District, between Sangu and Tamrang, mixed 

 shrubs in deep gorge, c. 5,200', x-xi.1961 ; 2 $, collected with holotype ; 3 $, below 

 Sangu, by stream in shady ravine, c. 6,000', 30.x. 1961 ; 1 <$, river banks below 

 Tamrang Bridge, c. 5,500', x-xi.1961 ; 3 <$, below Sangu, mixed vegetation on 

 sheltered slopes above river, c. 4,000', 3.L1962 ; 1 $, Sangu, mixed vegetation in deep 

 gully, c. 6,200', 2.i-i3.ii.ig62 ; 1 $, between Sangu and Tamrang, mixed plants by 

 damp cliff in deep river gorge, c. 5,200', i-ii.1962 ; 1 3, edge of mixed forest above 

 Sangu, c. 6,200', 17.x-1.xi.1961. 1 $, Arun Valley, east shore of River Arun below 

 Tumlingtar, evergreen shrubs bordering dry stream-beds, c. 1,800', 14-23. xii.1961 

 {R.L.C.), BMNH ; 1 ?, at the Tokyo Metropolitan University. 



Resembles L. aerea Okada, 1956 (Japan) especially in the shape of phallic and 

 periphallic organs, and somewhat fuscous wings, but differs from it in having front 

 mesonotum, and abdominal tergites not shining metallic blue, and clasper teeth less 

 numerous, the row of teeth not extending to the lower tip of the clasper. 



