﻿Bomhyliidne (BijJtera) from Central Africa. 639 



Tliorax black, with a yellow spot before the scutellum and yellow 

 shoulders ; it is clothed with dense grey hairs, without any black 

 hairs, as are also the pleurae ; the tomentum is yellow ; the usual 

 bristles are wanting, so far as I can see; nietapleural tuft white; 

 squamulae dark brown, with a whitish fringe ; haltères yellow. 

 Scutellum yellow, with white hairs, without bristles. Abdomen of 

 oval shape, entirely yellow, with a black rounded basal spot in the 

 middle of the second segment and very narrow transverse black 

 stripes before the hind margin of the second and third segments ; 

 there is white tomentum on the sides and on the venter ; first seg- 

 ment with whitish hairs on the sides. Male genitalia yellow. Legs 

 wholly yellow, the tarsi darkened at the tip ; hind tibiae with short 

 black bristles ; ungues with the base red and bearing a small tooth ; 

 femora without bristles. Wings short and broad, greyish hyaline 

 with a yellowish tint, which is more intense towards the base and 

 along the fore margin ; veins thick, yellow, brown outwardly ; small 

 cross-vein placed a little before the middle of the discal cell ; base 

 of the second vein opposite to the small cross-vein ; the vein dividing 

 the second from the third submarginal cell bent at a right angle in 

 the middle and here with a short stump; the first posterior cell very 

 broadly open, second and third almost of equal width at the end ; 

 discal cell short and of a very characteristic shape, its posterior 

 boundary deeply bisinuate, forming with the proximal boundary a 

 wide W with rounded angles ; in the right wing only of the typical 

 specimen the middle angle of the W emits an appendix into the cell. 

 x\.nal cell broadly open. Prealar hook yellow ; basal comb of the 

 wings yellow. 



Type $, from North Nyasa, Lake shore, near Deej) Bay, 

 December 25, 1909 {Dr. J. B. Davcy); a single specimen, 



52. Exoprosopa voiosa, Wiedemann (1819). 



A single specimen from Nyasaland, Blantyre, April 20, 

 1910 (Dr. J. E. S. Old), which agrees well enough with 

 Loew's description, but has a rather longer proboscis and 

 the white scales of the abdomen disposed in a somewhat 

 different manner. The long erect black hairs covering the 

 upperside of the abdomen are very peculiar. 



53. Exoprosopa lepidogastra, sp. nov. 



$. Length of the body (of 5 specimens) 12-13 mm., of the wing 

 11-12 mm. 



A very distinct species owing to its quite narrow and elongated 

 discal cell and the conspicuous patches of black scales on the sides of 

 the abdomen. 



