DIPTERA FROM NEPAL 93 



Kikkawa and Peng, 1938 : 530 (Japan, Korea, Manchuria, Saipan) ; Pavan and da Cunha, 

 1947 : 20 ; 23 (Brazil) ; Tan, Hsu, and Sheng, 1949 : 197 (China). [Mis-identification]. 



Taplejung District, Sangu, mixed vegetation by stream in gully, c. 6,200', ix-x. 

 1961, 1 (J, 1 $ ; ibid., rotting fruits of Bhor tree on ground, c. 6,200', 7-31.X.1961, 

 2 6*. 3 ? I ibid., from rotten Naspati fruits in traps, c. 6,200', 8-31.X.1961, 18 $, 10 $, 

 1 puparium ; ibid., from rotten bananas in traps, c. 6,200', x-xii.1961, 33 ,-J, 4 O. ; 

 ibid., mixed vegetation by stream in gully, c. 6,200', xi. 1961-1.1962, 1 9 ; between 

 Sangu and Tamrang, mixed shrubs in deep gorge, c. 5,200', x-xi.1961, 1 $ ; Arun 

 Valley, below Tumlingtar, River Sabhaya, west shore, fermented millet seeds on 

 shore, c. 1,800', 24.xii.1961, 14^, n $ ; east shore of River Arun below Tumlingtar, 

 evergreen shrubs bordering dry stream-beds, c. 1,800', 14-23. xii.1961, 1 $ (R.L.C.). 



Distribution : Nepal, India, Java, Borneo, Sumatra, Viet-Nam, Formosa, 

 China, Japan, Korea, Micronesia, Hawaii, Samoa. 



The males and some females from Arun Valley are evidently smaller and darker 

 than those from Taplejung, the former having sex-combs composed of lesser number 

 of teeth (17 and 16 in the first and second tarsal joints, respectively) than in the 

 latter (33 and 23), and the egg-guide teeth also few in number (12 to 16) than in the 

 latter (20). These two forms agree however in the general features of phallic and 

 periphallic organs. 



Drosophila (Sophophora) trapezifrons sp. n. 



(Text-figs. 268-273) 



o\ ?• Body about 2 mm. Head slightly broader than thorax. Eyes oval, dark reddish 

 brown, thickly pilose. Antennae with second segment yellowish orange ; third greyish brown, 

 slightly longer than broad. Arista with about four dorsal and two ventral long branches and a 

 small terminal fork. Palpus yellow, slender, with only one apical seta. Ocellar triangle black, 

 somewhat glossy ; frontal triangle black. Periorbit black, narrow, straight, five-sevenths as 

 long as front. Front dark orange-yellow, anteriorly paler and much convergent, anteriorly 

 about two-thirds as broad as length down middle, posteriorly about half as long as head width. 

 Face black, pollinose greyish white, paler along eye margin. Clypeus pale brown. Carina high, 

 white, anteriorly broadened and fuscous, laterally fuscous. Cheek whitish grey, fuscous above, 

 about one-seventh as broad as the greatest diameter of eye. Occiput brownish black, medially 

 darker. Postverticals long. Anterior reclinate orbital about one-third as long as posterior 

 reclinate, one and a half times as distant from posterior reclinate as from proclinate ; three 

 orbitals nearly equidistant from eye margin, proclinate slightly inside others. Two long orals, 

 succeeding orals finer. 



Mesonotum dark yellowish brown, glossy, posteriorly darker. Scutellum dark yellowish 

 brown, slightly pollinose. Thoracic pleura yellowish grey, paler below. Two humerals, upper 

 longer. Acrostichal hairs in six rows. Anterior dorsocentrals half as long as posteriors ; 

 distance between anterior and posterior dorsocentrals two-fifths distance between anterior 

 pair. Anterior scutellars divergent, slightly shorter than posteriors, which are slightly nearer 

 to each other than to anteriors. Sterno-index about 06 ; median sternopleural one-third as 

 long as posteriors. Legs yellow ; all metatarsi as long as next three segments together. Male 

 fore leg with large longitudinal sex-combs, composed of about twenty-one black teeth on meta- 

 tarsi and eighteen similar teeth on the second segment. Preapicals on all legs ; apicals on mid 

 and hind legs. Wing hyaline, veins brown, crossveins clear. Costa reaching M ; i? 4 + 5 and M 

 nearly parallel ; R 2 + 3 straight, not curved to costa at tip. C-index about 2-8 ; 4V-index about 



