DIPTERA FROM NEPAL 61 



sided, broad, mediodistally with a small black spot. Carina very low, white. Cheeks yellowish 

 white, black above, about one-fifth as broad as the greatest diameter of eye. Occiput black, 

 medially yellow. Anterior reclinate orbital about half as long as proclinate, just outside pro- 

 clinate, much nearer to proclinate than to posterior reclinate. Posterior reclinate slightly 

 longer than proclinate. Vibrissa long, stout ; second oral about one-third as long as vibrissa ; 

 succeeding orals shorter. 



Mesonotum greyish brown, bluish grey pollinose, anteriorly pale, dark along dorsocentral lines 

 and caudomedially. Scutellum grey pollinose, grey-brown, laterally pale. Thoracic pleura 

 greyish brown, pollinose. Two long humerals, lower slightly longer. Acrostichal hairs in two 

 rows. Anterior scutellar long, divergent ; posterior scutellar three-fifths as long as anteriors, 

 one and a half times as distant from anterior as from each other. Sterno-index o-6. Legs 

 mostly yellowish grey ; coxae yellow ; fore tibia and fore tarsi brownish black ; last two tarsal 

 segments of mid and hind legs black. Pulvilli white, large. Front metatarsi as long as next 

 two segments together, mid and hind metatarsi as long as next three segments together. Pre- 

 apicals on all legs ; apicals prominent on fore leg. Wings narrow, hyaline ; crossveins clear, 

 i? 2+3 gently curved to costa at tip ; R i+i and M parallel ; costa reaching M. C-index about 2 -6 ; 

 4V-index about 1 4 ; 4C-index about 07 ; 5x-index about 1 -8 ; Ac-index about 3-4. Ci-bristle 

 two ; C3-fringe on basal one-third. Halteres yellow, elongate, dark at tip. Abdominal 

 tergites greyish black, bluish grey pollinose. Abdominal sternites pale grey. 



Periphallic organs : Genital arch brownish black, pubescent, dorsally narrowing, anterior 

 margin with narrow projection below. Clasper brownish black, large, triangular, dorsocaudally 

 with an acute black projection, distally with a convex row of about fourteen pointed black teeth 

 on almost entire margin, and with a few short marginal setae below. Anal plate brownish black, 

 very large, separated from genital arch, ventrally broadened, rounded below, setigerous and 

 pubescent. Phallic organs : Aedeagus yellowish orange, oblong, apically rounded in lateral 

 aspect, basally narrowing. Basal apodeme slender, rod-like, half as long as aedeagus. PI = 

 20. Anterior paramere minute, conical, distally with a few sensilla. Ventral fragma tri- 

 angular, brownish ; lateral arm broad and pointed apically ; median notch deep, acute ; 

 submedian process narrow, without submedian spine, p.f. = aBCdEfg HikLmn. Egg-guide 

 lobe dark brownish black, robust, distal margin obliquely truncate, with about twenty-four 

 marginal and twenty scattered discal strong black teeth. Basal isthmus short. 



Holotype^. East Nepal : Taplejung District, Sangu, mixed vegetation in deep 

 gully, c. 6,200', 2j-13.ii.1962 (R.L.C.), BMNH. 



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



Paratypes : Taplejung District, 7 <y, 4 $, same data as holotype ; 11 <J, 8 $, 

 Sangu, mixed vegetation by stream in gully, c. 6,200', xi. 1961-1.1962 ; 1 <J, 2 $, 

 Sangu, mixed vegetation by stream in gully, c. 6,200', ix-x.1961 ; 1 <$, ibid., clearing 

 in small wood, c. 6,200', 25.xi.1961 ; 1 $, ibid., spray-splashed rocks in shallow ravine 

 c. 6,200', 25-28. x.1961 ; 1 $, ibid., damp evergreen oak forest, c. 9,200', 2-26. xi. 

 1961 ; 7 <$, 6 $, ibid., mixed vegetation in dried-up ravine, c. 6,800', 16.ii.1962 ; 

 2 cy, below Tamrang Bridge, river banks, c. 5,500', x-xi.1961 ; 1 <$, below Sangu, 

 edge of small mixed wood, c. 6,000', 2-26.xi.1961 ; 1 <$, ibid., 4.XL1961 ; 2 $, ibid., 

 mixed vegetation on sheltered slope above river, c. 4,000,' 3.1.1962 ; 2 $, ibid., by 

 stream in shady ravine, c. 6,300', 30.x. 1961 ; 3 $, Dobhan, east bank of River 

 Tamur, mixed vegetation by stream in deep gully, c. 3,000', i-ii.1962 (R.L.C.), 

 BMNH, 1 (J, 1 $ at the Tokyo Metropolitan University. 



Closely allied to S. subspiendens Duda, 1935, (East Siberia) especially in having 

 two rows of acrostichal hairs, medially pale occiput, and $ with large anal plate, but 



