50 Orthorrhapha brachycera. 



or yellowish hairs; there is a præsutural bristle and a groiip of supra- 

 alar and postalar bristles, all black. Scutellum with black hairs and 

 long, black marginal bristles. Pleura black and chiefly black haired, 

 only at the hind margin of the mesopleura and among the long hairs 

 on the metapleura there are some pale hairs. Abdomen black, some- 

 what shining; the hind margin of the third segment and the middle 

 of the fourth and fifth segments in the whole length red, the red 

 colour produced laterally at the front and hind margins of the fourth 

 and fifth segments; sometimes there is also a very narrow, red hind 

 margin on the second segment and a small spot at the front margin 

 of the sixth ; the red colour is more or less completely hidden under 

 the dense, red pubescence. Venter black, shining. Abdomen clothed 

 in front with erect, whitish hairs which are long at the lateral margin, 

 the middle part of the second segment and the folio wing segments 

 are clothed with bright red hairs which are depressed and directed 

 from the median line to each side; the hairs may stop at the hind 

 margin of the fifth segment or go as a little spot in on the sixth 

 segment or finally they also clothe the whole sixth segment; the red 

 hairs do not reach the lateral margin which, like the apex, is black 

 haired; at the lateral hind corners of the third and fourth segments 

 there are white hairs. Venter sparingly clothed with long, whitish 

 hairs. The male genitalia are large, the arms of the upper forceps 

 are somewhat shovel-shaped with broad ends; from the dorsal side, 

 somewhat before the apex two flat, striated prolongations issue, a 

 larger outer and a smaller inner; the arms of the lower forceps have 

 two somewhat upwards curved branches; the large ventral lamella 

 reaches the apex. The genitalia are black haired, the hairs are some- 

 what long above, short below, at the apex of the ventral lamella 

 there are long, strong hairs; the small apical styles are pale haired. 

 Legs black, not specially densely hairy, the hairs whitish and black 

 intermingled, but chiefly pale on the femora and more black on. 

 the tibiæ; long and thin hairs are found especially on the ventral 

 side of the femora, on the ventral and dorsal sides of the hind tibiæ^ 

 on all sides of the middle tibiæ and on the front tibiæ except on the 

 anterior side; stronger spine-like bristles are found on the anterior 

 and posterior sides of the hind femora downwards, and on the dorsal 

 side of the hind tibiæ, on the anterior side of the middle femora and 

 some long ones on the dorsal side of the middle tibiæ and finally on 

 the dorsal side of the front tibiæ; they are all black as are also the 

 strong bristles on the tarsi. The dense pubescence on the ventral 

 side of the front tibiæ and at the apex on the posterior and ventral 

 sides of the hind tibiæ is brown as is also the dense pubescence on 



