4 AiniaJfs of tJie South African Museum. 



"22 (5). Tibiae bare or only pilose, destitute of spicules disposed in rows ; but 

 if the spieules are sometimes distinct, then the palpi are 2-jointed ; 

 body not bristly. 



2'3 (32). Cubital fork very broad ; if it is rather narrow, then the body is 

 shoi-t and broad (Uriinae). 



24 (29). Body very pilose; squanmlae with a long fringe; plumula usually 



distinct ; face provided with a more or less distinct circular brush. 



25 (28). Proboscis long; third antenna! joint dilated at end; facial brush 



well developed. 



26 (27). First antennal joint more or less elongate, but always of a cylindrical 



shape ; antennae placed near the tipper border of the facial brush 



Corsomym, Wied. 



27 (26). First antennal joint short and swollen; antennae placed near the 



middle of the facial brush . . Callynthropliora, Schin. 



28 (25). Proboscis shorter than the mouth-opening ; third antennal joint 



linear ; facial brush less distinct ; antennae placed near the upper 

 border of the facial convexity . . . Gnumyia, gen. nov. 



29 (24). Body almost bare ; squamulae with a short fringe or nearly bare; 



face destitute of circular brush. 



30 (31). Antennae inserted near the mouth, with a thick third joint. 



Hyperusia, Be//ci. 



31 (30). Antennae set far from the mouth, with a slender third joint; palpi 



long and thin ..... Megapalpus, Macq. 



32 (23). Cubital fork narrow ; if it is rather broad, then the body is narrow 



and elongate (Phthiriinae). 



33 (40). Ambient vein complete. 



34 (39). Four posterior cells present ; palpi 2-jointed. 



35 (36). Cubital fork broad ; anal cell open ; tibiae with three rows of distinct 



spieules ...... Gonarthrus, Bezzi. 



36 (35). Ciibital fork narrow; anal cell closed; tibiae without or with less 



distinct spieules. 



37 (38). Face hairy ; third antennal joint longer than the first ; eyes of the 



male united ..... Crocidium, Loew. 



38 (37). Face bare ; third antennal joint shorter than the first ; eyes of the 



male separate ... . Apatomyra, Wied. 



39 (34) Three posterior cells only ; palpi single-jointed ; first antennal joint 



longer than the third . . . . Pseudoxmictits, Big. 



40 (33). Ambient vein incomplete, ending at apex of the anal vein. 



41 (42) . Four posterior cells present ; discoidal cell complete ; face bare ; third 



antennal joint with a lateral stype apically ; palpi single-jointed. 



Phthiria, Meig. 



42 (41). Three posterior cells only. 



43 (44). Discoidal cell closed; third antennal joint acute at end, with a ter- 



minal style ; palpi single-jointed .... Geron, Meig. 



44 (43). Discoidal cell open ; third antennal joint obtuse at end, with a lateral 



style ; palpi 2-jointed .... Apolysis, Loew. 



45 (4) . Metasternum exceedingly developed ; hind legs very strong and long ; 



eyes coalescing in both sexes or nearly so ; body bare and narrow ; 

 wings and abdomen pedunculate (Systropinae) . Systropus, Wied. 



