1907.] Catalogue of the Goleoptera of South Africa. 369 



a 1 . Scutellum not grooved laterally. 



6 1 . Clypeus of s and occasionally of ? 

 with a basal median horizontal tooth 

 or lamina not reaching the apex. 



c 2 . Scutellum longer than broad, very 

 sharp at tip. 



Mesosternal process strongly re- 

 curved at apex ; inner lobe of 

 maxillae with a distinct hook . . Isandula. 



b". Clypeus of s simple as in the ? . 



d=. Sternal process long, aculeate not 

 recurved 



Inner lobe of maxillae simple, 

 upper lobe long, sub-falcate ; elytra 

 plainly costulate Ptychodesthes. 



d-. Sternal process short, bluntly acu- 

 leate. 



Maxillary lobes simple in both 

 sexes ; clypeus deeply incised late- 

 rally at base, outer angles broadly 

 rounded, fore margin broadly 

 emarginate Raceloma. 



c 1 . Scutellum almost as broad as long, 

 sharp at tip. 



d\ Sternal process long, strongly re- 

 curved. 



Inner lobe of maxillae simple, upper 

 lobe strongly hamate, head with a 

 short carina ending in a tooth in 

 the centre of the clypeus . . . . Taniesthes. 



Inner lobe of maxillae simple, upper 

 lobe acuminate, head simple in both 

 sexes Plcesiorrhina 



E'. Sternal process not projecting beyond the 

 coxae. 



F 1 . Base of prothorax straight above the 

 scutellum. 



a. Scutellum elongated, sharply tri- 

 angular. 



Clypeus simple ; truncate at apex with 

 the margin reflexed ; elytra pluri- 

 costate ; livery black with fulvous or 

 whitish patches on the prothorax, and 

 a white margin on the elytra . . . . Mazoe. 

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