1904.] Catalogue of the Goleoptera of South Africa. 5 



B 1 . Clypeus strongly constricted laterally, tri-dentate in front. 



C 2 . Body elongated, sub-parallel, very little convex. 



Antennae 10-jointed. 



E 2 . Head with a clypeal keel and a frontal suture. 



a 2 . Anterior tibiae tri-dentate. 



b 2 . Clypeal keel triangular. 



Clypeus with the outer angles rounded, basal 



joint of hind tarsi very short Camentoserica. 



b x . Clypeal keel straight, set close to the frontal 

 suture. 



Anterior part of clypeus divided into two by 

 a longitudinal keel. 



c 2 . Anterior tibiae without inner spur in the male. 



Joints of anterior tarsi of male broadly dilated 

 transversely, and gradually tapering towards 

 the apex, claws very long and slender . . . . Allokotarsa. 



c 1 . Anterior tibiae with an inner spur in the male. 



Anterior tarsi and claws of male normal . . ? Mesoserica* 



a 1 . Anterior tibiae bi-dentate outwardly. 



Joints of anterior tarsi of male fused, sub- 

 parallel, sub-aculeate inwardly, last joint 

 slightly wider, sub -parallel Arraphytarsa. 



Joints of anterior tarsi of male elongated, 



slender, cylindrical, and fused together . . Alogistotarsa. 



E 1 . Head with only a frontal suture. 



Anterior tibiae uni-dentate, without inner spur in 

 the male. 



Anterior tarsi of male long, partly fused, straight 



inwardly, slightly rounded at tip outwardly . . Dolerotarsa* 



C 1 . Body ampliato-ovate or sub-spherical, convex or very 

 convex. 



Clypeus with only a sharp frontal keel Trochalus. 



A 1 . Eyes divided in front by the genal canthus and having also 

 a posterior keel. 



B 2 . Clypeus not constricted laterally nor sharply tri-dentate 

 in front. 



C 2 . Posterior eye-keel broadly separated from the genal 

 canthus. 



