1900.] Catalogue of the Coleoptcra of South Africa. 323 



specimens than in others ; gense sharply angular at base, denticulate 

 laterally ; clypeus slightly bi-dentate laterally, apical part emarginate 

 at tip where the margin is reflexed, in the anterior part of the head 

 there is a short, laminate, vertical horn more or less deeply 

 emarginate at tip, the whole surface of the head is strongly plicate, 

 and the genae are a little granulose ; prothorax vertical in front but 

 having on each side a very deep but narrow excavation, while the 

 median part, which is broadly triangular, is prolonged at tip as a 

 horizontal compressed horn reaching as far as the cephalic one, and 

 having underneath a long, vertical tooth at about the median part, 

 the anterior part is scrobiculate, and the posterior dorsal one, as well 

 as the horizontal horn, are covered with a granulose transverse 

 scrobiculation, in the minor or perhaps the intermediate develop- 

 ment there is no cephalic horn, but instead of it there is a transverse, 

 highly raised, post-median carina, somewhat sharply but briefly 

 dentate at each end ; the prothorax is only moderately impressed 

 laterally, but is not excavate, the median lobe is produced in 

 two short, slightly divaricating horizontal horns, and there is a 

 short, sharp ridge above the impression ; it is this development 

 which Harold described as H. jupiter, while I mistook it for the 

 female of H. selousi ; elytra with a basal tubercle on the second, 

 third, fourth, and fifth intervals, and occasionally on the first. 



Female : Altogether similar to that of H. erjjx. 



The substitution of a post-median cephalic transverse carina for 

 an anterior cephalic horn in the male is very singular, but this occurs 

 also in small examples of H. gigas ; this change, however, is also 

 accompanied by a difference in the shape of the prothorax, which 

 then approximates to that of the female. 



Length 32-37 mm. ; width 21-22 mm. 



Hab. Southern Ehodesia (Mazoe, Manica). Occurs also in 

 Nyassaland. 



Harold suggests, loc. cit., that H. f annus, Bohem., described from 



a female example, might prove to be the female of H. Jiaviifer. I 



have ascertained that H. f annus is the female of H. satyrus. 



Gen. CATHAESIUS, Hope, 

 The Coleopt. Man., i., 1837, p. 21. 



Mentum deeply incised, outer part attenuate sub-obliquely towards 

 the tip which is sharp, basal point of labial palpi either broadly 

 quadrate or broadly ampliate inwardly, second broader and shorter 

 than the first, and inserted into the outer angle of the basal one, sub- 



