Bombyliidae. 107 



4. Wings blackish on more than the lialf part, the black 

 colour sending a prolongation down towards the poste- 



rior margin, outwards to the end of the discai cell. ... 2. maurus. 



— Wings blackish only on the basal half towards the an- 



terior margin 3. afer. 



5. Abdomen in both sexes with five distinct, transverse 

 bands, the bands on fifth and sixth segments rather broad 

 and distinct ; the black hair tufts at the sides of the 



fifth and sixth segments small 5. circumdatus. 



— Abdomen in the male without bands or these indistinct 

 and hidden under the fur; in the female with distinct 

 bands on second, third and fourth segments, that on 

 the third segment very narrow; on the fifth and sixth 

 segments very narrow or indistinct bands; the black 

 hair tufts at the sides of the fifth and sixth segments 

 somewhat large and distinct 6. 



6. Male with no bands on abdomen, the hair tufts on the 

 seventh segment white ; the patagium-like piece at the base 

 of the wing silverwhite ; female with the band on the 

 third segment generally very narrow; not especially broad 



species 6. paniscus. 



— Male with indistinct, hidden bands on abdomen, the hair 

 tufts on the seventh segment yellow; the patagium-like piece 

 at the base of the wing yellow or somewhat brownish; 

 female with the band on the third segment generally more 



distinct than in paniscus; large and broad species .... 7. hottentottus. 



1. A fenestratus Fall. 



1814. Fall. Dipt. Suec. Anthracid. 8, 4. — 184^. Zett. Dipt. Scand. I, 

 199, 7, et 1855. XII, 4584, 7. — 1862. Schin. F. A. I, 49. - 1903. 

 Kat. palåarkt. Dipt. II, 176. 



Male. Black or brownish black. Frons with short, erect, black 

 hairs, and with scaly, golden or more silvery hairs; epistoma some- 

 what protruding, with yellow and black hairs and with silvery, scaly 



Fig. 37. Antenna of .-1. fenestratus. X 45. 



hairs, Jowis yellow haired, the ground colour yellow; occiput greyish, 

 covered with scaly, silvery hairs, especially along the eye-niargin ; at 

 the hind margin of the occiput a short, whitish fringe. Antennæ 

 black, the basal joint reddish; the two first joints with black hairs; 



