DIPTERA FROM NEPAL 31 



posterior dorsocentrals about one-fourth distance between anterior pair. Anterior scutellars 

 long, divergent ; posteriors shorter, nearly equally distant from each other as from anteriors. 

 Sterno-index about 0-7. Legs yellowish white ; knees of mid and hind legs narrowly black ; 

 all metatarsi nearly as long as the other segments together. Preapicals on all legs ; apicals on 

 fore and mid legs. Wing hyaline, veins dark yellow, crossveins clear. R 2 +3 somewhat convex 

 anteriorly at middle, curved to costa at tip ; i? 4 + s strongly convex anteriorly before middle. 

 Costa reaching tip of i? 4 + 5 . C-index about 23 ; 4V-index about 3-3 ; 4C-index about 17 ; 

 5x-index about 10 ; Ac-index about 2-7. Ci-bristles two ; C3-fringe on basal five-eighths. 

 Halteres yellow, stalk paler. Abdominal tergites orange-yellow ; iT entirely yellow ; 2-6T 

 with black spots as follows : two on 2T, 3 small on 3T, three large on 4T, three small on 5T, two 

 small on 6T. 



Aran Valley, east shore of River Arun below Tumlingtar, evergreen shrubs 

 bordering dry stream-beds, c. 1,800', 14-23. xii.1961, 5 $. Taplejung District, 

 Dobhan, mixed vegetation in dry gully on wooded slope, c. 3,500', 29. i. 1962, 1 $ 

 {R.L.C.). 



Distribution : Nepal (new locality), Java, Formosa, Japan, Fiji, Africa. 



Leucophenga nigriceps sp. n. 



(Text-figs. 76-80) 



<J. $. Body about 3 mm. Head slightly broader than thorax. Eyes dark red, bare, large. 

 Antennae with second segment yellow ; third yellowish grey, oblong, twice as long as broad, 

 pale at the base of arista. Arista with about five dorsal and one ventral branches and a small 

 terminal fork, branches rather short. Palpus slender, curved, yellow, apically black. Ocellar 

 triangle black. Periorbit slightly paler than front, short, a little more than half as long as front. 

 Front flat, narrow, parallel-sided, pale yellowish grey, matt, anteriorly five-sevenths as broad 

 as length down middle, posteriorly one-third as broad as head width. Clypeus pale yellowish 

 brown. Face yellowish white, concave. Carina undeveloped. Cheeks yellow. Very narrow, 

 about one-sixteenth as broad as the greatest diameter of eye. Occiput black. Orbitals 

 subequal in size ; anterior reclinate orbital close to and outside proclinate, more than four times 

 as distant from posterior reclinate as from proclinate. Only one prominent oral. 



Mesonotum dark orange-brown, medioanteriorly paler, medioposteriorly fuscous. Scutellum 

 black, apically pale. Thoracic pleura yellowish brown, with irregular longitudinal patches ; 

 sternepisternum largely black. Humerals two, lower longer. Acrostichal hairs in about eight 

 irregular rows. Anterior dorsocentrals two-thirds as long as posteriors ; distance between 

 anterior and posterior pair nearly one-third distance between anterior pair. Anterior scutellars 

 long, divergent ; posteriors half as long as anteriors. Sterno-index about 06. Legs yellow ; 

 mid and hind knees dark ; front and hind metatarsi subequal to next three segments together, 

 mid metatarsi longer than the other segments together. Preapicals on mid and hind legs ; 

 apicals prominent on mid leg. Wing hyaline, veins black, crossveins clear. M apically pale ; 

 i? 2+3 gently curved to costa at tip. C-index about 25 ; 4V-index about 18 ; 4C-index about 



11 ; 5x-index about 1 -3 ; Ac-index about 1 -9. Ci -bristles two ; C3-fringe on basal three-fifths. 

 Halteres entirely pale yellow. Abdominal tergites : iT yellow, 2T black, medioanteriorly and 

 laterally yellow, 3T shining silvery blue especially in male, 4T to caudal end largely black. 



Periphallic organs : Genital arch broad, black, paler below, much narrowed above, broadly 

 truncate below, caudal margin with a few setae, anteroventral corner with a few shorter setae ; 

 heel low, rounded. Anal plate small, oblong, pale. Clasper large, quadrate, pubescent interior- 

 ly, setigerous exteriorly, pale yellowish brown. Decasternum in shape of narrow cross bar. 

 Phallic organs : Aedeagus black, bifid, sinuate in lateral aspect, with short basal apodeme ; 

 ventral recurved process short, rod-like, pale, apically pointed. Anterior paramere fusiform, 

 pale, with a longitudinal row of a few sensilla at middle. Posterior parameres yellow. PI = 



12 o. p.f. = ABCDeFgHikLmN. 



