31 G Professor Aldrich on the 



bristles and two small ones, its disk large. Abdomen short, for 

 a male, tapering, the posterior margin of each segment, with a row 

 of large bristles, which are longest on the last segment. Hypopy- 

 gium disengaged, large, bent forward under the abdomen, the 

 lamellae rather small. Fore and middle coxas with bristles and 

 hair on the front side ; the hind ones with two bristles on the 

 outer side. Middle and hind femora with a pre-apical bristle. 

 Hind metatarsus without bristles above. Second and third longi- 

 tudinal veins straight, moderately divergent ; fourth curving 

 abruptly forward about the middle of its last segment, then gradu- 

 ally curving in the other direction, so that near the extremity it 

 has a concavity behind, ending near the third vein. Posterior 

 cross- vein a little more than its length from the margin. 



1. Leptocorypha ])avo, n. sp. (PL XII., fig. 112, wing.) 

 $ . Bright, metallic-greeu. Front wide, bright-green, a little 

 concave. Face moderately narrow, wider above, covered with a 

 smooth coat of whitish pollen. Palpi but little visible, yellow, 

 with only one or two very minute bristles. Cilia of the inferior 

 orbit whitish, no long hairs behind them. Occiput flat. Antenna 

 large, reddish, first joint hairy above, broad at the end, drawn out 

 on the inner corner into a cone ; second joint transverse, hairy 

 above ; third joint very large. Viewed from the side, the last on 

 its proximal, lower corner runs back entirely past the second joint. 

 It is very high, rounded above, the arista dorsal rather short and 

 stout with long pubescence, the lower distal portion of the joint 

 drawn out into a long up-curved point, densely short, pilose on 

 the inner and lower side. It reaches about to the middle of the 

 arista, and beyond its end the latter has longer pubescence than 

 before it. This third joint in outline is similar to that of some 

 species of Tahanus. Thorax very bright metallic-green, somewhat 

 whitish-dusted about the front part. The triangular areas of fine 

 bristles above mentioned are on a bronze ground colour. Trans- 

 verse suture very far forward, a black spot along its upper side. 

 Scutellum long, nearly rectangular on its disk. Pleurse mostly 

 black, dusted lightly with white, around the base of raiddle and 

 hind COX93 more or less yellow. That thin fold of the integument 

 which, in many species of this family, begins just above the hind 

 coxae and expands upward, so as to partially embrace the first 

 abdominal segment, is strikingly conspicuous in my specimens of 

 this species. Halteres and tegute yellow. Cilia of the latter 

 black. Abdomen bright-green, a narrow line of black along the 

 posterior border of each segment, numerous black hairs and a 



