146 Transactions South African Philosophical Society, [vol. xii. 



triangular ; the posterior tibiae are similar, and the basal outer tooth 

 of the anterior tibiae is broadly separated from the others. 



The female has more convex elytra than the male, and the clypeus 

 is triangular but more aculeate than in the same sex of 0. 

 iincinatus. 



Length 21-22 mm. ; width 11-11|- mm. 



Hah. Southern Rhodesia (Enkeldoorn, Buluwayo). 



Onitis robustus, Bohem., 

 Plate XXXIV., fig. 7. 

 Insect. Caffr., ii., p. 246. 

 0. zamhesianus, Pering., Trans. Entom. Soc, 1896, p. 154. 



Eeddish brown, moderately shining, elytra sub-opaque ; head 

 granulose, clypeus somewhat elongate, slightly truncate, no clypeal 

 carina, frontal carina highly raised, connected laterally with the 

 basal one which is nearly as highly raised, slightly tuberculate in 

 the centre with the tuberculiform process grooved, the space between 

 the frontal carina and the basal one is deeply impressed on each 

 side ; prothorax convex, marginate in front and laterally, as well as 

 in the base between the two basal impressions which are not v^y 

 deep, the surface is scabrous in the anterior part for about one- 

 third of the width, and somewhat closely punctured from there to 

 the base, except in and between the two basal impressions where 

 they are granulose ; scutellum very small ; elytra robust, convex, 

 a little sinuate laterally behind the shoulder, humeral callus not 

 conspicuous, they are finely striate, the striae are geminate and 

 shining, and the intervals plane and finely aciculate ; pygidium 

 coriaceous in the male, granular in the female ; metasternum 

 totally granular, and having a longitudinal, smooth, slightly raised 

 line. 



Male : Anterior tibiae strongly quadri-dentate outwardly and very 

 strongly and acutely serrate underneath from the base to a short 

 distance from the mucro which is long, sharp and sub-diagonal ; 

 anterior femora thick, sharply carinate, and having a small, but very 

 distinct tooth on the upper edge, not quite in the centre, and another 

 and smaller one close to the knee, intermediate femora with a sharp 

 lamina deeply incised at apex and forming thus a curved tooth on 

 each side of the incision (fig. 7), intermediate tibiae very slender at 

 base and ampliated inwardly into a long, quadrate process ; posterior 

 femora having a narrow five-serrate lamina, posterior tibiae normal, 

 somewhat slender and straight. 



i 



