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



or less distinct longitudinal shallow groove with smooth, flat walls 

 and a smooth patch on each side in the posterior part, the outer 

 margins are simple or serrate ; scutellum ogival ; elytra sub- 

 cylindrical, but a little depressed in the posterior part, faintly 

 costulate or not and covering almost the whole of the propygidium 

 which has a deep, median, longitudinal groove ; pygidium vertical, 

 slightly convex, more or less cordiform ; abdomen not much convex 

 in the male, more so in the female ; pectus densely hairy ; legs and 

 tarsi moderately long, anterior tibiae uni- or bi-dentate outwardly 

 and with a very small inner spur, posterior ones with an evanescent 

 oblique keel, claws moderately long and with a vertical tooth under- 

 neath a little before the median part ; in the female the spurs of the 

 hind tibiae are only very slightly compressed. 



The species included in this genus are extremely alike, and were it 

 not for the shape of some of the antennal joints in the male their 

 identification would prove almost impossible. On that account I 

 do not propose, therefore, to split the genus into species with 

 9-jointed or 10-jointed antennae or uni-dentate or bi-dentate tibiae. 

 The head and prothorax are deeply pitted, each puncture bearing a 

 whitish scale and occasionally an erect hair, and the less deeply 

 pitted elytra have bands of similar scales, sometimes interrupted, 

 and alternating with denuded lines, while the pygidium and the 

 abdomen, the latter especially, are densely scaly. 



Key to the Species. 

 A 2 . Antennae 9-jointed. 



B. Anterior tibiae bi-dentate outwardly. 



Elytra with three broadly interrupted bands of scales on each 



side deridens. 



A 1 . Antennas 10-jointed. 



B 2 . Anterior tibias uni-dentate. 



a 2 . Club tri-jointed. 



Clypeus almost hexagonal. 



b 2 . The two penultimate joints of pedicel not aculeate. 



Elytra uniformly covered with scales, but having three 



small denuded patches on each side eckloni. 



Elytra with alternate, entire rows of scales barkeri. 



b 1 . The two penultimate joints of pedicel aculeate. 



Elytra with broadly interrupted bands of scales . . . . gracilis. 

 a 1 . Club 4-jointed. 



Elytra with broadly interrupted bands of scales . . . . duponti. 



