Chilosia. 139 



hoUowed below the antennæ, the central knob protruding but epistoma 



very slightly hollowed below it; it is pruinose all over (when not 



rubbed), and it is somewhat but not much descending. Eye-niargins 



somewhat broad, a little pruinose, with pale 



hairs. Occiput grey pruinose, with distinct, 



yellow hairs all round, and above besides 



with long, black hairs. Antennæ black or 



brown, third joint small, roundish, not longer 



than broad ; arista distinetly thickened in 



about the basal third, distinetly but short- 



pubescent. Thorax black, somewhat olive, 



finely punctate, shining; it is clothed with 



somewhat short, erect, deeply yellow hairs; 



on the posterior part there are some few 



stronger and a little longer, almost bristly, 



black hairs. There are distinct but not long „. ,.„ „ , ^ 



. , f^ig- o2- Head of 



notopleural, postalar and scutellar margmal ^^ pubera c?- 



bristles; the supraalar bristles short. Pleura 



with long, yellow hairs, black above and generally also posteriorly. 

 Abdomen black, somewhat olive, fmely punctate, shining but dullish on 

 the greater part of the disc of the three first segments, least on the third ; 

 it is clothed with not quite short, all yellow pubescence, longest at the 

 sides, especially towards the base. Venter somewhat greyish pruinose, 

 with pale hairs, longest on the two first segments. Genitaha some- 

 what large. Legs black; the longer hairs on femora yellow, and also 

 the short hairs on both femora and tibiæ to a high degree yellow; 

 front femora with some black, almost bristly hairs on the posterior 

 side, and middle femora with some similar hairs beneath; hind femora 

 black setulose beneath ; hind metatarsi slightly thickened. Wings some- 

 what strongly yellow tinged, especially towards base and anterior 

 margin, the extreme base browner; upper angle at the upper marginal 

 cross-vein acute, Squamulæ whitish, with a yellowish margin and 

 fringe. Halteres orange. 



Female. Frons not narrow, widening downwards, trisulcate with 

 the middle furrow somewhat distinct; it is somewhat densely and 

 quite yellow-haired, only on the vertex there are some dark hairs. 

 Antennæ very slightly larger than in the male. Thorax and abdomen 

 densely but finely punctate; thorax with short, quite erect, almost 

 golden pubescence, longest anteriorly; scutellar marginal bristles 

 numerous; abdomen with very dense, yellow pubescence, long at the 

 basal corners. Legs all or almost all yellow-haired; hind femora not 

 black setulose beneath. 



