6 Annuls of tin 1 HonfJt African Mu 



70 ((57). Face bluntly convex, mther prominent ; second longitudinal vein 



originating before the middle cross-vein; third antenna! joint 

 gradually tapering- into a not thin point ; pnlvilli well developed. 



Kynthtsia, gen. nov. 



71 (<>0). Front tibiae smooth ; proboscis projecting-; face conically prominent 



or at least bluntly convex ; third antennal joint cone-shaped; third 



posterior cell often short . . . Thyridanthrax, O.S. 



1'2 (65). Three or four submarginal cells ; ocellar tubercle far remote from the 



vertex; claws usually with a distinct basal tooth. 

 78 (76). Three submarginal cells only; claws with a. long- and acute basal 



tooth. 



74 (75). Face rounded; proboscis longer than the oral cavity, usually very 



projecting-; fore tibiae beset with spicules Litori-hijiirhus, Macq. 



75 (74'). Face mainly conical; proboscis shorter and less projecting ; fore 



tibiae usually smooth . . . Exoprosopa, Macq. 



76 (73). Four submarginal cells; claws with a short and obtuse tooth. 



Hyperalonia, Kond. 



IA- BOMBYLIIDAE. 

 BOMBVLIIXAE. 



BOMBYLJUS, Linne. 



Syst. Nairn-., eel. x, p. 228, 1758. 



This genus is very abundantly represented in the South African 

 Fauna. The genus Trii>la#ins, as it was understood by its author in 

 1855 and 1860 (with the exclusion of the American species added 

 subsequently), is evidently the same as Bombyliiis, being based only 

 on the variable character of the three submarginal cells ; at any rate 

 the type-species T. bivittatvs (which is wanting in the South African 

 Museum collection) must be considered as congeneric with B. lateralis. 



The very numerous South African species in the collection may be 

 divided in the following traditional groups of higher value: 



1 (6). Hind femora spinose at base; antennae approximate at base and 

 with the first joint not thickened ; wings with a more or less 

 developed basal comb, often of very large size. 



U (5). Eyes of the male united; no strong bristles on head or on fore part 

 of thorax ; third antennal joint usually short, and not much attenuated 

 at end; pulvilli more or less biit always well developed; wings with 

 small basal comb and with the discal coll usually more or less 

 acute oiitwardly. 



3 (4). Hairs of prevalent black colour, at least on abdomen; there 

 are usually silvery spots of squamose hairs on head, thorax and 

 abdomen . . . ater Group. 



