﻿On tliv ]}oiiih//liid FdHHU "f Soufk Africa {Diptcra). 3 



African. Poor in representatives is the genus Hi/peralotiia, wliicli 

 for a long time was believed to be absent from the Cape Fauna. 



Tlie classification of the family will be dealt with by me in my forth- 

 coming general work on the Bombyliidae of the Ethiopian region in 

 the British Museum ; the classification has recently made great 

 progress through the valuable contribution of my friend Th. Becker, 

 ^Genera Bombyliidaruu),' 1913, in which he recognised no less than 

 fifteen subfamilies. 



I give here a synoptic ta])le of the groups and of the genera 

 represented in the collection of the South African Museum. 



1 (Ô4). Hind border of the eyes not indented, or very rarely with a deep 



sinuosity only (Eurycarenns) ; eyes without a bisecting line. 



2 (-tT). Occiput flat, not bilobate above and withovit a central cavity ; 



occipital fringe typically i)laced at the border of the eyes. 



•3 (-46). Prothorax less developed and not esi^ecially setose. 



4 (45). Metasternuiii not specially developed ; liind legs not specially strong ; 

 eyes of the females separated ; body rather ]iroad and more or less 

 pilose. 



-5 (22). Tiliiae with 3 rows of long spicules; pro)ioscis long; palpi single- 

 jointed ; metapleurae iisnally hairy ; body bristly. 



(■) (21). Abdomen broad, of oval or rotund shape; antennae approximate 

 together at base (BonihyUinae). 



7 (16). First posterior cell closed at end; metapleurae iisually hairy. 



s (15). Hind border of the eyes absolutely entire; first posterior cell closed 

 by the third longitudinal vein ending at costa ; wings Avith a well- 

 developed basal coml). 



i) (12). First basal cell longer than the second. 



10 (11). Three submarginal cells present . . . Triplaslus, Loew. 



11 (10). Two submarginal cells present . . . Bombylius, Loew. 



12 (9). First basal cell not longer than the second. 



13 (14). Face prominent and moderately pilose; discoidal cell as in the 



preceding genus ..... Systoechus, Loew. 



14 (13). Face rounded and more densely pilose ; discoidal cell very obtuse at 



end ....... Anastoechiis, O.S. 



15 (8). Hind border of the eyes with a deep sinuosity; first posterior cell 



closed by the fourth loiagitudinal vein ending at costa ; basal comb 

 small or wanting ..... Eurycarenus, Loew. 



16 (7). First posterior cell open; wings with no distinct basal comb; 



metaplevirae usually bare. 



17 (18). Only two submarginal cells present . . Dischistns, LoeAV. 



18 (17). Three submarginal cells present. 



19 (20). Third antennal joint quite bare above . . Adelidea, Macq. 



20 (19). Third antennal joint beset with long hairs above 



Sosiomyia, gen. nov. 



21 (6). Abdomen nai-row and cylindrical; antennae .separated at base 



(Cythereinae) .... Oniromyia, gen. nov 



