176 Miss G. RicarJo on 



short. Abdomen with yellowish hairs on sides of basal 

 segments. 



Length, c? 32, $ 26 mm. — these latter are immature. 



Male. — Face black covered with glistening yellow tomen- 

 tum, tubercle large with a moustache of yellow bristly hairs 

 and yellow bristles ; these extend as yellow hairs to the base 

 of antennae. Beard yellow. Palpi with long yellow hairs. 

 Antenna blackish, the first two joints with yellow hairs on 

 lower sides and some black ones above. Forehead with black 

 and yellow bristly hairs on sides and with two or more weak 

 yellow hairs on the ocelligerous tubercle. Hind part of head 

 with black bristles^ some yellow ones in the centre, continued 

 round to the oral opening. Thorax black with some greyish 

 tomentum and the usual stripes. Scutellum covered with 

 weak yellow hairs or bristles and with long black bristles on 

 the posterior part, but not bordering the edge, which is 

 armed chiefly with the weak yellow or white bristles, though 

 some of the specimens have some black bristles. Abdomen 

 with the usual dark spots, appearing blackish with grey 

 tomentose segmentations ; the first four segments with 

 yellowish hairs, thickest at the sides, in some of the speci- 

 mens they are white, the remaining segments with short 

 yellow recumbent pubescence and white hairs at the sides ; 

 underside with long pale yellowish or white hairs. Genitalia 

 black, the upper forceps club-shaped with a, segment-like 

 base about half as wide as the last segment, furnished with 

 a thick fringe of black hairs below, the lower forceps small, 

 all with long black hairs. Legs blackish, the yellow hairs 

 longest on the underside of the fore and middle femora and 

 tibioe ; the fore femora with no bristles below ; the tibiae with 

 appressed reddish pubescence on their inner sides ; tarsi with 

 black bristles, some yellow ones on the hind tibiae ; short 

 yellow pubescence is apparent on the tibiae and the first 

 tarsal joints. Wings large, greyish, with a deeper grey 

 tinge in the middle of the first submarginal cell, the small 

 transverse vein below the middle of the discal cell. 



Female identical. Moustache with black and yellow 

 bristles. Palpi with black bristles, the hairs above yellow 

 and then black at base of antennae, the basal joints of which 

 are clothed with chiefly black hairs. Scutellum with black 

 bristles on dorsum and at edge. Abdomen with more grey 

 than yellow hairs. Ovipositor short, but the abdomen is 

 crumpled, so that it is difficult to ascertain if the last two 

 segments are usually compressed, before the ovipositor 

 proper. The yellow hairs on the legs do not appear to be 

 so thick, all bristles are black. 



