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



!>'. Clypeus strongly uttonuated in front, simple 

 in both sexes. Sternal process long, mode- 

 rately long or sub-obtuse Schizorrhinii. 



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 Schizorrhiua. 



Outer angles of clypeus sharply 

 produced beyond the fore margin. 



Sternal process long, incurved, 



body glabrous Gnatliocera . 



Sternal process projecting but 

 little beyond the coxse, body 

 villose Oiiathocerida. 



a'. 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 Gametis. 



F 2 . Base of prothorax straight above scu- 

 tellum. 



Anterior margin of prothorax simple ; 

 elytra slightly or not costate, anterior 

 tibia? bi-dentate Cosmiopluzna. 



F'. Base of prothorax produced triangu- 

 larly above the scutellum so as to 

 cover part or the whole of it . . Gymnetii. 



a-. 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'. Base of prothorax covering the 

 whole of the scutellum. 



Anterior margin of clypeus not 

 reflexed; sternal process long, 

 strongly incurved Amazula. 



