DIPTERA FROM NEPAL 63 



Allotype $. Taplejung District, Sangu, clearing in small wood, c. 6,200', 25.x. 1961 

 (R.L.C.), BMNH. 



Paratype £ : Taplejung District, ex Lycopodium sp. on slope above Sangu, 

 c. 7,800', 11-14.1.1962 (Head missing) (R.L.C.), BMNH. 



Closely allied to S. grahami Hackman, (China) but ocellar triangle not darker than 

 any part of front, arista with three dorsal branches (four in grahami), thoracic 

 pleura not dark reddish brown, scutellum not brown medially, and male clasper with 

 fewer and stronger teeth on entire outer margin (on lower half and without stout 

 teeth in g.). 



Scaptomyza (Scaptomyza) silvata sp. n. 



(Text-figs. 176-182) 



6\ ?• Body about 2-2 mm. Head very slightly broader than thorax. Eyes oval, relatively 

 small, dark purplish brown, thickly pilose. Antennae orange-yellow ; second segment brown 

 at base ; third broad, triangular. Arista with about three dorsal and a ventral short branches 

 and a small terminal fork. Palpus orange in o, black in ?, apically with a few rather short stout 

 black setae. Ocellar triangle velvety black, large, longer than broad. Ocelli greyish brown. 

 Periorbit grey, pollinose, without frontal hairs, apically rounded and not reaching anterior 

 margin of front. Front grey, pollinose, anteriorly orange, somewhat narrowing, as broad as 

 length down middle ; posteriorly about half as broad as head width. Face yellowish white, 

 slightly concave, nearly parallel-sided. Carina low, black, narrow, broadened below, reaching 

 buccal margin. Cheek yellowish white, black posteriorly, about one-fourth as broad as the 

 greatest diameter of eye. Occiput black, medially white, pollinose. Anterior reclinate orbital 

 two-thirds as long as proclinate, outside proclinate, and thrice as distant from posterior reclinate 

 as from proclinate. Proclinate slightly shorter than posterior reclinate. Vibrissae strong, second 

 and third orals one-fourth as long as vibrissae. 



Mesonotum black, bluish grey pollinose, with a median and lateral black longitudinal stripe, 

 median one reaching end of scutellum. Scutellum black, bluish grey pollinose. Thoracic 

 pleura black, somewhat glossy. Two humerals, upper longer. Acrostichal hairs in four rows. 

 Anterior dorsocentrals four-fifths as long as posteriors ; distance between anterior and posterior 

 dorsocentrals about five-eighths distance between anterior pair. Anterior scutellars long, 

 divergent, twice length of scutellum ; posteriors two-thirds as long as anteriors, one and a half 

 times as distant from anteriors as from each other. Sterno-index about 05. Legs greyish 

 brown, trochanters and fore coxa yellow, femora black, last two tarsal segments black ; all 

 metatarsi as long as next three segments together. Preapicals on all legs ; apicals on mid leg. 

 Wings hyaline, veins brown, tip somewhat pointed. R 2 +3 medially convex anteriorly, gently 

 curved to costa apically ; costa reaching end of M ; R 4 + 5 and M parallel. C-index about 3-1 ; 

 4V-index about 14 ; C^index about 0-7 ; 5x-index about 0-9 ; Ac-index about 2-5. Ci- 

 bristle one, long ; C3-fringe on basal one-third. Halteres yellow. Abdominal tergites black, 

 somewhat glossy. Abdominal sternites black, large quadrate. 



Periphallic organs : Genital arch dark brownish black, pubescent, dorsally much narrowing, 

 ventrally broadly truncate and with a few long setae, subapically with a deep caudal incision. 

 Clasper oval, dark brownish black, marginally with a row of about ten black teeth, discally with 

 numerous black pointed teeth in about three rows above and six rows below. Anal plate dark 

 brownish black, very large, fusiform, separated from genital arch, setigerous and pubescent. 

 Decasternum rhombic, dark brownish black. Phallic organs : Aedeagus yellowish brown, 

 somewhat sinuous, elliptical, tip rounded in lateral aspect. Apodeme black, narrow, short and 

 straight, about one-fourth as long as aedeagus. PI = 4-0. Vertical rod as long as apodeme, 

 black, slender. Anterior paramere small, oval, pubescent, brownish black, attached to the 



