GONOMi'IA. 



473 



moderately pubescent. Thorax : dorsum dark brownish grey, the 

 colour almost taking the form of three longitudinal contiguous 

 stripes; mesonotal suture pale yellowish, as is also the longi- 

 tudinal depression on the post-sutural part of the dorsum ; side 

 margins below the level of the dorsian pale yellowish white, but 

 not so distinctly continued round in front as in G.fiavomarginata ; 

 sides of thorax yellowish, especially posteriorly, microscopically 

 dusted with bluish-black. Scutellum bright lemon-yellow, with a 

 small duskv triangle at base. Abdomen dark brown, emarginations 

 of segments moderately disiinct, with pale hairs, whidi are 

 more conspicuous at the sides ; belly more yellowish ; ovipositor 

 yellowish. Legs bro\\nish yellow, coxaj and base of femora paler. 

 Wings clear, moderately glabrous. Auxiliary vein ending a Httle 

 further beyond the origin of the 2nd longitudinal vein than in 

 the previous two species ; 2nd vein forked, the upper branch 

 bisinuate, the lower one nearly straight ; base of 3rd vein (placed 

 at the angle of the 2nd) almost punctiform, running straight to 

 immediately above the wing-tip and almost ])arallel with the 

 upper branch of the 4th ; the 1st posterior cell being, however, 

 distinctly though not greatly wider at the base than at the tip ; 

 anterior cross-vein straight, shorter than in the two previous 

 species ; discal cell pentagonal, the three veinlets straight, the 

 outer ones diverging. Stigma distinctly present, pale blackish, 

 elongated, but without sharp delineation. Halteres pale dirty 

 yellow. 



Length 2^-3^ millim. 



Described from one male and several females in the Indian 

 Museum; tyjM male from Kurseong, 13-16. vii. 07, tgpe female 

 from Darjiling, 5. viii. 09 (Paiva) ; other females from Darjiling, 

 0. viii. 09 {Jenkins), Kurseong, 25-28. iii. 10, on window, 5-7. vii. 08, 

 and 22. vi. 10 (all Annandah). 



The last specimen mentioned has the posterior cross-vein near 

 the middle of the discal cell. 



340. Gonomyia aperta, sp. nov. (PI. IX, fig. 8.) 



S. Head mainly yellowish, ueck dark. Proboscis and palpi 

 blackish; antennal scape yellowish ; flagellum blackish, with pale 

 pubescence. Thorax: dorsum and dorsum of scutellum medmm 

 grey with a slight brownish tinge, lighter along the sutures ; sides 

 in front of wing whitish grey, posteriorly yellowish, with a trace 

 of whitish dust ; sternopleurse brownish. Edge of scutellum and 

 the metanotum yellowish. Abdomen yellowish, a little black_ at 

 base and tip. Genitalia conspicuous, brownish yellow, consisting 

 apparently of a pair of large claspers, a ventral elongated piece 

 and two pairs of filamentous appendages, the upper ones being 

 much the shorter. Legs yellowish, darker towards the tips. 

 Wings pale yellowish grey, nearly clear, distinctly glabrous. 

 Stigma distinct but ill-defined, pale blackish. Auxiliary vein ending 

 at the origin of the 2nd longitudinal ; lower branch of fork of 



