166 



black bristles on it ; style-rlike portion usually somewhat darker, with 

 its last annulation conical and not very thin and with microscopical 

 apical bristles. Eyes large, in profile strongly convex below and some- 

 what deeper than broad, apparently bare from pubescence; facets all 

 equally small. 



Thorax roundish, brownish black or greyish black, but usually 

 rather grey on the front part, clothed with dense brownish yellow or 

 deep orange yellow pubescence which becomes paler towards the front 

 part and which grows up much longer and shaggy towards the sides 

 especially above the bases of wings, and with numerous but inconspi- 

 cuous erect black hairs all over except on the front part ; humeri 

 moderate in size and with numerous long and erect paler pubescence ; 

 praealar calli distinctly densely covered with a brownish yellow or 

 slightly greyish brown-yellow dust, and bearing an abundant long 

 curved shaggy brownish yeliow pubescence which is intermixed with 

 similar though rather stout black hairs ; postalar calli clothed with very 

 numerous long hairs similar to those above the wing-bases ; scutellum 

 usually much more yellowish, clothed with brownish yellow and black 

 hairs as on the disc of the thorax, but these hairs always become longer 

 around the margin. Pleurae ashy grey or sometimes greyish black, 

 with long dense pale brownish yellow or orange yellow pubescence on 

 the upper hind part of the mesopleurae and on the upper and hind 

 parts of the metapleurae, close to the tuft on the squamae, but more 

 sparsely and paler pubescence elsewhere ; prothorax covered with 

 numerous but not so dense as in the meso- or meta-pleurae long hairs. 



Wings quite clear, but the base and the costal and subcostal 

 cells yellowish ; veins yellow, but the costal vein and all the thin veins 

 after about the middle of the wings dark brown ; upper branch of the 

 cubital fork almost always with a conspicuous or sometimes rather long 

 recurrent veinlet ; first posterior cell widely open but somewhat narrow- 

 ed at the wingmargin ; anal cell .closed rather long before the wing- 

 margin. Squamae in the alar pair light brownish glassy with a dark 



