134 Orthorrhapha brachycera. 



Male. Vertex and frons green. Epistoma somewhat broad, nar- 

 rowed downwards, white, Palpi yellowish. Occiput green or æneous, 

 greyish pruinose; postocular bristles whitish below, black above. An- 

 tennæ shorter than the head, third joint as long as or a little longer 

 than broad, the lower margin very convex, the upper straight, the 

 apical point short, truncate or rounded, turned dorsally; the antennæ 

 are black, the basal joint yellowish below at the apex. Thorax green 

 or slightly golden green, sometimes bluish green, slightly pruinose, 

 shining; scutellum finely yellow pubescent; postscutellum greenish or 

 æneous, grey pruinose; propleura with pale hairs and a black pro- 

 thoracic bristle. Abdomen green, or more or less golden or coppery, 

 finely whitish pruinose downwards, with very narrow and indistinct 

 dark hind margins to the segments, or these wanting; it is clothed 

 with short, black hairs, and has somewhat short hindmarginal bristles, 

 only slightly longer on the first segment. Venter greyish green, slightly 

 pale-haired. Hypopygium somewhat large, black or slightly æneous 

 black, greyish pruinose above; eighth segment with black hairs; there 

 are somewhat projecting posterior ventral lobes, with the point turned 

 upwards; the inner lamellæ somewhat short, curved downwards, the 

 median thin, the lateral dilated with a dilatation at the apex and a 

 small spine at the upper margin; the outer lamellæ almost rectangular, 

 whitish with a narrow, blackish margin along the ventral, apical and 

 outer half of the dorsal edge; at the end there are some teeth with 

 curved, black hairs, and dorsally to them a pair of curved hairs; the 

 ventral margin is serrated, with curved hairs, and on the inside 

 inwards directed hairs. Legs yellow, front coxæ slightly greyish just 

 at the base, whitish or greyish white pruinose anteriorly; posterior 

 coxæ grey, with the apex yellow; anterior tarsi with apex of meta- 

 tarsus and the four foUowing joints black; apex of hind tibiæ, and 

 the hind tarsi black. The legs have short, black hairs, hind femora 

 a little longer hairs above towards the base and a fringe of fine, 

 longish, yellow hairs below in the whole length ; posterior femora 

 with one preapical bristle; front tibiæ with bristles above, and two 

 on the postero-ventral side; middle tibiæ with about five antero-dorsal 

 (one of them more dorsal), two postero-dorsal bristles, and one 

 ventral bristle below the middle; hind tibiæ with two dorsal rows 

 of bristles, one ventral bristle towards the apex, and a ventral row 

 of small bristles; hind metatarsi with two to three dorsal bristles, some 

 anterior, and with small ventral bristles. Wings very slightly tinged; 

 veins black, costa with a small, short, somewhat punctiform swelling; 

 discai vein with a not small, but quite obtuse bend; axillary lobe 



