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



Maxillae sub-mucronate. 



Body moderately attenuated behind, elypeus 

 rounded laterally, body quite black, prothorax 

 with t> broad, deep impressions, sternal process 

 cuneiform Trymodera. 



B\ Basal part of prothorax normal, scutellum plane, sharply 

 triangular. 



I) . Inner costa of elytra not quite obliterated in the 

 posterior part. 



Maxillae simple, penicillate. 



Body moderately attenuated behind, sternal 



process long, plane, sub-hamate at the tip .. Lipothyrea. 



D 1 . Inner costa of elytra obliterated past the median 

 part. 



a . Maxillary upper lobe uni-dentate, penicillate. 



Body plainly attenuated behind, base of 

 prothorax moderately arcuate above the 

 scutellum Polystalactica. 



a 1 . Maxilla? simple, penicillate. 



Body moderately attenuated behind, pro- 

 thorax ampliate rounded laterally, very 

 slightly projecting in the centre of the base Glaucoctlis. 



C. Sternal process plainly marginate in front. 



<i. Maxillae inermous and provided with a long 

 pencil of hairs. 



b. No sexual differences. 



E 2 Body not strongly attenuated behind ; elypeus 

 sub-truncate, not emarginate in front. 



c . Basal part of prothorax arcuate above the 

 scutellum. 



Body plane, lateral part of the base of the 

 pro-thorax plainly angular ; sternal process 

 sub-triangularly arcuate ; livery black and 

 white Lonchothyrea. 



. Basal part of prothorax not arcuate above 

 the scutellum. 



Body moderately deplanated, base of pro- 

 thorax rounded laterally, sternal process 

 bluntly arcuate ; livery black and white . . Leptothyrea. 



E 1 Body strongly attenuated behind, elypeus 

 long, attenuated and emarginate or incised 



in front. 



c'. Basal part of prothorax straight above 

 the scutellum. 



