Hypocera. 177 



dull; the bristles curiously placed, the middle row very convex, its 

 middle bristles placed on a line with the outer bristles of the front 

 row, this latter row wants the middle bristles; there are two pairs 

 of supraantennal bristles, the anterior pair small, the posterior some- 

 what larger. Antennæ black, third joint large, conically pointed; 

 arista nearly nude, placed near the apex of the joint and thus subapical. 

 Palpi of moderate size, black, with short bristles. One distinct genal 

 and one distinct oral bristle. Thorax black, dull, with brownish black, 

 somewhat longish pubescence and one pair of dorsocentral bristles. 

 Scutellum with two bristles, the anterior pair only represented by 



Fig. 67. Wing of H. vitripennis ^ . 



small hairs. Mesopleura not hairy above. Abdomen black, dull, second 

 and sixth segments elongated, the very short hairs almost only visible 

 at the sides. Hypopygium quite small, greyish black, of the construc- 

 tion typical for Hypocera; it has somewhat bristly hairs below; anal 

 tube not protruding. Legs not robust, hind tarsi somewhat long; the 

 legs are brownish black, the front legs, especially tibiæ, paler and all 

 tarsi brownish or brownish yellow; front tibiæ with a dorsal bristle 

 at the upper third, middle tibiæ with a pair at the upper tliird and 

 an anterior bristle at apex, hind tibiæ with two anterodorsal bristles, 

 one at the upper third and one at or below the middle (they are 

 recorded to have sometimes a third bristle below the others) and 

 with a quite small, spur-like bristle at apex; the hind tibiæ are simple, 

 without dorsal furrow. Wings clear and colourless, thick veins brown 

 or blackish brown, the others nearly colourless; costa scarcely reaching 

 to the middle, 1 somewhat longer than 2; costal ciha short; first 

 vein curved and the mediastinal vein developed; third vein bent 

 angularly upwards at apex, without hairs, but witli a distinct bristle 

 at base; fourth vein not evenly and much curved; only one bristle 

 on alula. Halteres black. 



12 



