118 



Orthorrhapha brachycera. 



sometimes with coppery reflexes, slightly whitish pruinose downwards, 

 and with dark hind margins to the segments ; it is clothed with short, 

 black hairs, and has hindmarginal bristles, increasing in length to- 



wards the end and also a little 

 longer on the first segment. Venter 

 greenish grey, slightly yellow-haired 

 at the base. Hypopygium large, 

 æneous black, grey pruinose; eighth 

 segment with longish, black hairs; 

 there are broad,rounded, but slightly 

 projecting posterior ventral lobes 

 with some long hairs; the middle 

 ventral lobes project somewhat back- 

 wards, they are unsymmetrical, one 

 much longer than the other; the 

 inner lamellæ are somewhat long, 

 curved downwards, the median thin, 

 but a little dilated at the apex and 



Fig. 32. D. nitidus. Apical part of hvpo 



pygium; the lateral inner lamella and h^re with fme hairs, the lateral COn- 



ihe dorsal median appendage are seen 



behind the outer lamella. siderably dilated, and with various 



dilatations at the apex; the outer 

 lamellæ are somewhat long and narrow, they are especially narrow 

 towards the base, and hence petiolated and almost pear-shaped with 

 the end truncate, and they are curved more outwards than commonly; 

 they are whitish with a somewhat broad, blackish margin; there are 

 no teeth but the end margin is serrated and bears very long, black, 

 curved hairs ; the outer part of the ventral margin has shorter, finer 

 and paler hairs, and the dorsal margin has short, brown hairs. Legs 

 yellow, the anterior coxæ greyish white pruinose, posterior coxæ grey 

 with the apex yellow; front tarsi a little infuscated towards the end, 

 posterior tarsi with the apex of metatarsus and the four following 

 joints blackish; the middle tarsi may be more brownish; the hind 

 tibiæ are a little brown at the apex, especially above. The legs have 

 short, black hairs, a little longer above the hind femora towards the 

 base, and the hind femora have short, pale hairs below; the posterior 

 femora have one preapical bristle; the front tibiæ have bristles above, 

 and one or two on the postero-ventral side, and there is a very fine, 

 long hair at the tip on the ventral side; the middle tibiæ have about 

 three antero-dorsal, one dorsal, two postero-dorsal bristles, and one 

 ventral below the middle; the hind tibiæ have two dorsal rows of 

 bristles and one ventral bristle towards the end, besides a ventral 

 row of small bristles; hind metatarsi with two dorsal, one anterior. 



