GNOPHOMYIA. 489 



Marginal cross-vein distinctly beyond the 

 fork of the 2nd vein, either at a moder- 

 ately short distance beyond, or very 

 considerably beyond it ; antennas not 

 13-jointed 4. 



4. Marginal cross-vein a little, but distinctly, 



beyond the fork of the 2nd vein ; prae- 

 furca about half the length of the vein, 

 originating normally at an acute angle or 

 in a gentle curve ; discal cell present . . 5. 

 Marginal cross-vein at middle of upper 

 branch of 2nd longitudinal vein ; prso- 

 f urea less than half the length of the 

 2nd vein, arising abruptly in a distinctly 

 rounded angle 6. 



5. Anterior branch of 4th longitudinal vein 



forked ; a pale yellow slender species 



with yellow wings furcuta, sp. n., p. 491. 



Anterior branch of 4th vein simple ; 

 robust black species with distinct black 

 veins in wing strenun, ?p. n., p. 492. 



6. Both branches of 4th longitudinal vein 



forked aperta, sp. n., p. 492. 



Upper branch of 4th longitudinal vein 

 simple incompleta, sp. n. ; p. 493. 



350. Gnophomyia longipennis, sp. nov. (PI. IX, fig. 17.) 



$ . Head brownish grey ; proboscis and palpi dark. Antennae 

 brownish yellow, 15-jointed ; scapal joints normal, 1st sub- 

 cylindrical, long, 2nd much shorter, barely wider; 1st flagellar 

 joint elongated, much narrowed at base, followed by eleven 

 subequal oval joints and a long thin apical one. Thorax : dorsum 

 brown, with the usual three dark stripes indistinctly defined ; 

 the posterior part of the thorax, scutellum, and metanotum more 

 reddish brown, also the sides. Abdomen dull brownish yellow, 

 blackish towards tip, and with a blackish lateral stripe ; belly 

 brownish yellow. Ovipositor rather shortened, reddish yellow. 

 Leys uniformly brownish yellow, tarsi barely darker. Wings very 

 pale grey, much longer than the abdomen, highly iridescent, with 

 pale brown marks. Auxiliary vein long ; subcostal cross-vein some 

 distance before the beginning of the 2nd longitudinal, which origi- 

 nates at the middle of the wing in a strong curve, the praefurca 

 much less than half the length of the vein, the forks of which are 

 nearly parallel ; the distinct marginal cross-vein placed at the 

 middle of the upper branch ; the 3rd longitudinal vein bent sharply 

 at a right angle near its base, thence running straight to the wing- 

 tip ; both branches of the 4th vein forked, rather widely, the front 

 branch beyond and the hinder branch before its middle ; discal cell 

 open, coalescent with 3rd posterior cell, the base of which is pointed ; 

 posterior cross-vein beyond the base of the 3rd posterior cell ; 

 5th, 6th, and 7th veins nearly straight. The wing-markings are 



