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



Maxillae sub-mucronate. 



Body moderately attenuated behind, clypeus 

 rounded laterally, body quite black, prothorax 

 with 6 broad, deep impressions, sternal process 

 cuneiform Trymodera. 



B 1 . Basal part of prothorax normal, scutellum plane, sharply 

 triangular. 



D 2 . 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 r . Inner costa of elytra obliterated past the median 

 part. 



a 2 . Maxillary upper lobe uni-dentate, penicillate. 



Body plainly attenuated behind, base of 

 prothorax moderately arcuate above the 

 scutellum Polystalactica. 



a 1 . Maxillae simple, penicillate. 



Body moderately attenuated behind, pro- 

 thorax ampliate rounded laterally, very 

 slightly projecting in the centre of the base Glaucocelis. 



C'. Sternal process plainly marginate in front. 



a. Maxillae inermous and provided with a long 

 pencil of hairs. 



b 2 . No sexual differences. 



E 2 Body not strongly attenuated behind ; clypeus 

 sub-truncate, not emarginate in front. 



c3. 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. 



c 2 . 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, clypeus 

 long, attenuated and emarginate or incised 

 in front. 



c l . Basal part of prothorax straight above 

 the scutellum. 



