370 Transactions South African Philosophical Society, [vol. xiii. 



D 4 . Clypeus strongly attenuated in front, simple 

 in both sexes. Sternal process long, mode- 

 rately long or sub-obtuse ScMzorrhinii. 



G 2 . Intervals of elytra punctate or 

 seriate punctate. 



a. Maxillary lobes inermous, upper 

 one with a long pencil of hairs. 



F3. Base of prothorax strongly arcuate 

 above the scutellum. 



a 2 . Scutellum sharply acuminate at 



apex, grooved laterally Schizorrhina. 



Outer angles of clypeus sharply 

 produced beyond the fore margin. 



Sternal process long, incurved, 



body glabrous Gnathocera. 



Sternal process projecting but 

 little beyond the coxae, body 

 villose Onathocerida. 



a 1 . Scutellum little acuminate at tip, 

 not grooved laterally. 



Anterior margin of prothorax 

 slightly tectiform in the centre ; 

 body very plane, elytra not 

 costate, anterior tibiae tri-den- 

 tate Oametis. 



F 2 . Base of prothorax straight above scu- 

 tellum. 



Anterior margin of prothorax simple ; 

 elytra slightly or not costate, anterior 

 tibiae bi-dentate Cosmioplicena. 



F 1 . Base of prothorax produced triangu- 

 larly above the scutellum so as to 

 cover part or the whole of it . . . . Gymnetii. 



a 2 . Base of prothorax covering the 

 base only of the scutellum. 



Anterior margin of clypeus not 

 reflexed ; sternal process hardly 

 projecting beyond the coxae . . Discopeltis. 



a 1 . Base of prothorax covering the 

 whole of the scutellum. 



Anterior margin of clypeus not 

 reflexed; sternal process long, 

 strongly incurved Amazula. 



