276 Transactions SoutJi African Philosophical Society, [vol. xii. 



Key to the Species. 



Head without frontal carina or cephalic horn. 



Body nearly glabrous, sub-elongate, prothorax slightly ipunctate ; 

 anterior tibise not dentate outwardly anomahis. 



Head with two short basal horns. 



Body pubescent, much ampliated ; anterior tibijB very distinctly 

 bi-dentate liistcrinuf^. 



Caccobius histerinus, Fahr. 



Onthopliaijus histerinus. Insect. Caffr., ii., ]D- 302. 



Male : Intense black, shining, very densely but brief!}' pubescent ; 

 head deeply but not very closely punctured, gente without trace of 

 suture, but sub-triangular laterally, clypeus semicircular, very slightly 

 emarginate in the centre, there is no frontal carina, but at the base 

 are two supra-ocular conical tubercules ; prothorax a little wider at 

 base than at apex, rounded laterally in front, but nearly straight 

 from there to the base which is somewhat rounded in the middle but 

 very arcuate ; it is but little convex, yet somewhat retuse in front,. 

 a little depressed in the median part of the base, is covered with 

 round, deep punctures not quite contiguous, and is clothed with a 

 dense, short, decumbent greyish pubescence ; elytra very ampliate,, 

 as densely pubescent as the prothorax, narrowly geminato-striate, 

 striae punctured, intervals slightly tectiform and having close to the 

 stria two series of deep, not very regular punctures, second interval 

 as broad as the third, humeral callus moderately distinct ; pygidium 

 closely scrobiculate and a little scabrose, densely pubescent ; meta- 

 sternum with a basal, long, and deep ovate depression, impressed 

 line distinct in the middle ; antennae piceous red, clava fuscous ; legs 

 piceous red. 



In general appearance this insect much resembles Onthophagns: 

 piusio. 



Length 4i^-5 mm. ; width 3-3J mm. 



Hah. Southern Ehodesia (Umchecki Eiver). 



Caccobius anomalus. King, 

 Monatsb. Berl. Acad., Ib53, p. 653; Peters' Eeis., 1862, p. 235, 



pi. xiv., fig. 2. 



Onthophagns viocstus, Fjihr., Insect. Caffrar., ii., p. 284. 



Male : Black, head and prothorax shining, elytra a little less shining 

 than the prothorax ; head quite impunctate and without trace of any 



