172 Orthorihapha brachycera. 



anteriorly it is yellowish grey or light brownish pruinose; scutellum 

 slightly yellow pubescent at the margin, and vvith very few, short 

 hairs above. Pleura green or æneous, grey pruinose; propleura with 

 somewhat long, pale hairs and a black prothoracic bristle. Abdomen 

 green, sometimes more or less golden or coppery, fmely greyish white 

 pruinose downwards; it is clothed with short, black hairs; down the 

 sides there are some yellow hairs, which are predominant just along 

 the side margin; there are somewhat long hindmarginal bristles, not 

 longer on the first segment. Venter green, greyish pruinose, with 

 yellow hairs. Hypopygium somewhat large, greenish black, greyish 

 pruinose; eighth segment with somewhat strong, black hairs; on the 

 ventral side there are somewhat narrow lobes in the middle, which 

 project downwards, and with a hair at the anterior edge; at the end 

 of the hypopygium are two pairs of inner lamellæ, the lateral some- 

 what claw-shaped, with the hook-formed point turned upwards and 

 with a hair in the middle at the upper margin ; the median inner 

 lamellæ I have not examined more closely; the outer lamellæ are 

 somewhat large, roundish triangular, broader than long; they are 

 brownish yellow with a black margin, which is broad at the end; 

 they have somewhat strong, straight, bristly hairs along the whole 

 margin, shortest at the dorsal margin ; at the apical and ventral 

 margin there are besides inwards curved bristles; the ventral and 

 apical margin is a little serrated, with short teeth towards the dorsal 

 angle. Legs yellow, front coxæ somewhat whitish pruinose anteriorly, 

 posterior coxæ grey with yellow apex; tarsi blackish towards the 

 end, the front tarsi least, the hind tarsi most, almost black except 

 the basal part; hind metatarsus shorter than the second joint. The 

 legs have short, black hairs, front coxæ white-haired, with some 

 black, bristly hairs above towards the inside, and the femora im- 

 perceptibly pale-haired below; posterior femora with one preapical 

 bristle; front tibiæ with bristles above and on the postero-ventral 

 side; middle tibiæ with two dorsal rows of bristles, and one antero- 

 ventral bristle; hind tibiæ with two dorsal and one ventral row. 

 Wings hyaline ; veins black or brownish black ; costa thick and swollen 

 from the apex of the subcostal vein and on a long streak, evenly 

 decreasing in thickness outwards ; axillary lobe somewhat well developed. 

 Squamulæ yellow, with a yellow tringe. Balteres yellow. 



Female. Antennæ shorter than in the male, third joint not longer 

 than broad. Epistoma broad, greyish white. Wings a little tinged, 

 costa not thickened, 



Length 4,8 — 5,5 mm ; sometimes smaller specimens are found, down 

 to 4 mm. 



