192 Orthorrhapha brachycera. 



greenish, grey pruinose; postocular bristles black. Antennæ black, 

 shorter than the head, third joint short triangular with the lower 

 margin convex, not as long as broad; arista very short-haired. Thorax 

 dark green or more æneous, slightly pruinose , shining ; scutellum 

 distinctly short-haired. Pleura greenish, greyish pruinose; propleura 

 with sparse, more or less pale hairs, and a black prothoracic bristle. 

 Abdomen dark green or more or less æneous, only slightly greyish 

 pruinose downwards; it is clothed with short, black hairs, and has 

 somewhat short hindmarginal bristles, a little longer on the first 

 segment. Venter greyish pruinose, with yellowish or brownish hairs, 

 somewhat long at the base. Hypopygium as in cupreus and the 

 foUowing species; outer lamellæ small, roundish, broader than long, 

 with short hairs at the margin ; they vary in colour from dark yellowish 

 to blackish. Legs yellow, coxæ grey with the apex yellow, the front 

 coxæ may be yellowish to a greater extent; hind tibiæ more or less 

 brownish at the apex; tarsi with the apex of metatarsus and the 

 four following joints black or brownish, the front tarsi often also with 

 the second joint somewhat pale; hind metatarsus much shorter than 

 the second joint. The legs have short, black hairs; posterior femora 

 with one preapical bristle; front tibiæ with a few bristles above, but 

 none below; middle tibiæ with two dorsal rows, and with one ven- 

 tral bristle; hind tibiæ likewise with two dorsal rows, and with some 



Fig. 57. Wing of H. assimilis c?. 



small bristles on the ventral side, one below the middle stronger. 

 Wings a little brownish tinged; veins black or brownish black; discai 

 vein with a very small, nearly wanting bend, and after it a little 

 converging towards the cubital vein; posterior cross-vein somewhat 

 oblique and placed a little before the middle of the wing, thus the 

 first part of the discai vein considerably shorter than the second; 

 axillary lobe moderately developed. Squamulæ whitish yellow, with 

 a black fringe. Halteres whitish yellow. 



Female. Epistoma broad, grey. Antennæ shorter than in the 

 male, third joint very short. 



