DIPTERA FROM NEPAL 99 



between anterior pair. Anterior scutellars convergent, as long as posteriors, which are upright 

 and nearer to each other than to anteriors. Sterno-index about 05 ; median sternopleural 

 short. Legs yellow, all metatarsi as long as the next segments together. Preapicals on all 

 legs ; apicals on mid leg. Wings hyaline, crossveins clear. Costa reaching M, weak beyond 

 7? 4+5 . i? 4+5 and M parallel ; R 2 + 3 gently curved to costa at tip. C-index about 32 ; 4V-index 

 about 18 ; 4C-index about o-8 ; 5x-index about 14 ; Ac-index about 21. Ci-bristles two ; 

 C3-fringe on basal two-sevenths. Halteres dark yellowish brown. Abdominal tergites glossy 

 yellowish brown, each with a caudal black transverse band which is broadly interrupted at 

 middle and narrowing laterally and is especially large on 2-4T, somewhat triangular on 2T. 



Periphallic organs : Genital arch pale yellowish brown, dorsally pubescent and not distinctly 

 narrowing, ventrally narrowing abruptly and directed posteroventrally like a finger, apically 

 with about four strong black setae. Clasper basally brown, short and broad, with a straight row 

 of about thirteen long black teeth on entire outer margin, medially with about two strong black 

 bristles. Anal plate large, pale yellowish brown, setigerous, dorsally pointed, ventrally broadly 

 truncate, ventrocaudally with a short projection on which are inserted a few short stout setae. 

 Phallic organs : Aedeagus dark orange, straight, rod-like, apically rounded. Anterior 

 paramere brown, conical, partly fused to hypandrium, distally with a few sensilla. 

 Posterior parameres fused to make a brownish, horizontally flattened, laterally deeply concave 

 flap. Hypandrial plate oval, terminally with a long submedian spine. Ventral fragma tri- 

 angular, pale brown, with deep acute median notch, p.f. = aBCdefgHIklMN. PI = 2-0. 

 Egg-guide lobe yellow, elliptical, broadly rounded apically, with about twenty marginal and 

 three discal yellowish orange short thick teeth, ventrally with a short subterminal hair. Basal 

 isthmus orange-brown, narrow, about one-fifth as long as lobe. 



Holotype <$. East Nepal : Taplejung District, old mixed forest above Sangu, 

 c. 6,200', 25-29.X.1961 {R.L.C.), BMNH. 



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



Paratypes : Taplejung District, 2 o*, same data as holotype (R.L.C.), one at 

 BMNH, the other at the Tokyo Metropolitan University. 



Closely resembles D. (D.) bizonata Kikkawa and Peng, 1938 (Japan and neigh- 

 bouring countries), in having several long ventral setae on palpus, two long orals, 

 glossy yellowish brown mesonotum and in general similar features of periphallic and 

 phallic organs, but distinguished from it by having flat front, upright posterior 

 scutellars, aedeagus less dilated distally, ventrally narrowing genital arch, somewhat 

 triangular black bands on tergites, and clear crossveins. 



The HISTRIO Group 



Anterior reclinate orbital minute or small, about one-third to one-fifth as long as 

 proclinate. Second oral nearly as long as vibrissa. Palpus with a few prominent 

 ventral setae. Posterior parameres apparently absent. Including histrio Meigen, 

 1830, sternopleuralis Okada and Kurokawa, 1957, and trisetosa Okada in this paper. 



Drosophila (Drosophila) trisetosa sp. n. 



(Text-figs. 286-292) 



cJ, $. Body about 1 -8 mm. Head slightly broader than thorax. Eyes red, pilose. Anten- 

 nae with second segment orange-brown, third greyish brown with rounded tip. Arista with 

 about seven dorsal and four ventral branches and a small terminal fork. Palpus orange-brown, 

 rounded at tip, with a long terminal and a few ventral black setae. Ocellar triangle black. 



