86 OrthoiThapha hrachvcera. 



black above, white and a little longer at the sides of the three first 

 segments, and specially long on the first segment; there are hind- 

 marginal bristles of medium length, and almost not longer on the 

 first segment. Venter green, a little greyish pruinose, with pale hairs, 

 long at the base, and curved a little forwards on the third segment. 

 Hypopygium blackish green, greyish pruinose ; eighth segment with black 

 hairs; there are somewhat large, brownish, rounded posterior ventral 

 lobes, with a little joint at the upper corner; the inner lamellæ are 

 thin, curved downwards, the median hastately pointed, with a bristle 

 at the upper margin, the lateral a little dilated at the apex and here 

 with a bristle or spine; the outer lamellæ broad, somewhat triangular, 

 the ventral side drawn somewhat triangularly out; they are white, 

 Avith a narrow, black margin along the apical and outer part of the 

 dorsal edge, the ventral corner broadly black; at the dorsal corner 

 there are a pair of teeth with curved, black hairs, and dorsally to 

 them a pair of hairs with the apex bent and dilated; the apical 

 margin is serrated, with shorter hairs, and on the inside with short, 

 inwards curved hairs, which are dense and tuft-like at the ventral 

 corner. Legs with coxæ and femora black, anterior coxæ whitish 

 pruinose anteriorly; femora a little bluish metallic, and somewhat 

 greyish pruinose; the apex of the anterior femora and the anterior 

 tibiæ yellow, front tarsi darkened towards the end, with about the 

 three last joints blackish; middle tarsi white, with just the apex of 

 the joints blackish; hind tibiæ a little thickened towards the apex, 

 yellowish, blackened towards the end; hind tarsi black, long, con- 

 siderably longer than the tibiæ, the three last joints feathered with 

 long hairs on the dorsal side. The legs have short, black hairs, 

 anterior coxæ white-haired, and also the hind coxæ with some pale 

 hairs; middle femora with fine, longish, pale hairs below, black at 

 the apex, hind femora likewise, the black hairs in the apical third 

 long, forming a fringe; posterior femora with one preapical bristle; 

 front tibiæ with bristles above, and one on the postero-ventral 

 side; middle tibiæ with seven to eight antero-dorsal, two to three 

 postero-dorsal bristles, and with one ventral bristle below the 

 middle; hind tibiæ with two dorsal rows of bristles, and with 

 short, dense bristles on the ventral side, among which one or a 

 couple stronger towards the apex; hind metatarsus with three to 

 four dorsal bristles, and a few small on the anterior side. Wings 

 with the space above the cubital vein, from the apex of the sub- 

 costal vein, blackish, and with the posterior cross-vein blackish seamed, 

 the colour also stretching somewhat along the discai and postical 

 veins; veins black; costa with a quite small sweUing; discai vein with 



