DIPTERA FROM NEPAL 19 



brown recurved process ; hooked piece yellowish orange. Anterior paramere fusiform, with 

 long stalk, subapically with several sensilla. Ventral fragma anteriorly pointed, lateromedially 

 somewhat swollen. PI = 00. p.f. = ABCDeFgHikLmN. 



Taplejung District, Sangu mixed vegetation by stream in gully, c. 6,200', 9.xi.i96i, 

 3 $ ; below Sangu, by stream in shady ravine, c. 6,000', 30.x. 1961, 1 <J ; Aran 

 Valley : east shore of River Arun below Tumlingtar, evergreen shrubs bordering 

 dry stream-beds, c. 1,800', 14-23. xii.1961, 24^, 26 $ (R.L.C.). 



Distribution : Nepal (new locality), Java, Formosa. 



Leucophenga costata sp. n. 



(Text-figs. 35-37) 



9. Body about 2-3 mm. Head as broad as thorax. Eyes dark red, bare. Antennae with 

 second segment yellowish grey ; third grey, basally white, apically dark orange. Palpus 

 comparatively large, yellowish brown, apically rounded, with a subapical and a ventral black 

 setae. Ocellar triangle black, grey pollinose. Periorbit black, grey pollinose, broad, two-thirds 

 as long as front. Front yellowish grey, somewhat glossy, whitish and anterior width about 

 seven-eighths as broad as length down middle, posteriorly one-third as broad as head width. 

 Clypeus yellowish grey. Face greyish white, matt, concave. Carina low. Cheeks white, 

 narrow, about one-twelfth as broad as the greatest diameter of eye. Occiput dark brown. 

 Posterior reclinate orbital slightly longer than others ; anterior reclinate thrice as far from 

 posteriors as from proclinate. One prominent oral ; second fine, one-third length of vibrissa. 

 Postvertical rather long. 



Mesonotum dark yellowish brown, black behind, grey pollinose ; humeral callus grey polli- 

 nose, dorsally bordered by a somewhat fuscous patch. Scutellum dark brownish black, grey 

 pollinose. Thoracic pleura dark yellowish orange, with two black broad longitudinal stripes, 

 upper one extending to postnotum ; lower short, limited to sternepisternum. One long 

 humeral, a few shorter below it. Prescutellar longer than anterior dorsocentral. Acrostichal 

 hairs in about eight irregular rows. Anterior dorsocentrals one-third length of posteriors ; 

 distance between anterior and posterior dorsocentrals about one-third distance between anterior 

 pair. Anterior scutellars divergent, longer than posteriors ; posterior scutellars four-fifths as 

 long as anteriors, nearer to each other than to anteriors. Sterno-index about 0-7. Legs 

 yellowish white, knees of mid and hind legs black ; all metatarsi much longer than remaining 

 tarsal segments together. Wings hyaline, fuscous on and below costa ; costa reaching i? 4 + 6 . 

 Crossveins clear. J? 2 +3 weakly curved to costa at apex ; i? 4+6 and M nearly parallel. C-index 

 about 1 9 ; 4V-index about 2 4 ; 4C-index about 1 4 ; 5x-index about 1 -5 ; Ac-index about 

 2-0. Ci-bristles two, subequal ; C3-fringe on basal five-sevenths. Halteres yellowish white. 

 Abdominal tergites glossy black ; 2T posteriorly silvery white pollinose, ultimate T white, 

 3-5T latero-anteriorly with white patches. 



Holotype $. East Nepal : Arun Valley, east shore of River Arun below Tum- 

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

 {R.L.C.), BMNH. 



Paratypes : 2 $, same data as holotype ; 1 $, Taplejung District, between Sangu 

 and Tamrang, mixed shrubs in deep gorge, c. 5,200', 10.xi.1961. (R.L.C.), BMNH 

 and at Tokyo Metropolitan University (1 $ from Arun Valley). 



Similar to L. nigroscutellata Duda, 1924, (Formosa) in having black palpus, 

 striped thoracic pleura, yellow halteres, black costa, and clear crossveins, but dif- 

 fers in having entirely black scutellum (apically yellow in nigroscutellata) and palpus 

 with only a moderately strong apical seta. 



