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



apex and with the angles of the incision triangularly dentate and 

 slightly recurved in both sexes ; prothorax convex, transversely 

 scrobiculate in the anterior part, covered with large granules in the 

 posterior part and with roughly scabrose punctures laterally ; elytra 

 narrowly sub-punctulato-striate, intervals aciculate ; pygidium very 

 closely, but not very deeply punctate ; metasternum very densely 

 hairy and with the usual broad, basal depression, and a short, smooth 

 longitudinal carina. 



Male : Genas attenuate obliquely from the base, but also slightly 

 rounded there, at about the median part of the head the transverse 

 carina, w^hich is but slightly raised, emits at each angle a straight 

 horn varying in length from 3 to 4^ mm. ; the prothorax is shaped 

 like that of H. hamadryas, except that the apical part of the sub- 

 horizontal lobe is not as sharp, and is even occasionally truncate 

 at tip ; the supra-basal lateral fold, or elongated callus above the 

 humeral part of the elytra is also more pronounced than in H. 

 hamadryas, the lateral excavations are smoother, and the anterior 

 angle is sharp at tip, and not truncate and triangular laterally ; third, 

 fourth, and fifth intervals of elytra with a basal tubercle. 



Female : Clypeus of the same shape as the male, head with a post- 

 median highly raised transverse carina truncate at each end, very 

 slightly raised in the middle and occasionally distinctly dentate at 

 each end ; prothorax vertical in front, not so much raised there as 

 in the male, distinctly carinate at the top of the declivity for nearly 

 the whole of the width, and with the carina bi-sinuate. 



Length 32-38 mm. ; width 20-23 mm. 



This species might at first sight be mistaken for a small example 

 of H. hamadryas, but both sexes are distinguished from the latter by 

 the incised or deeply emarginate clypeus, and the male is especially 

 distinguished by having two long, straight horns on the head instead 

 of a transverse laminate carina ; the genital armature is also 

 different. 



Hab. Damaraland, Ovampoland. I was not aware of this species 

 having been met with east of these two localities until I saw^ the 

 unique type from which Boheman made his description, and which 

 is labelled '' Caffraria." ''' Later on he described H. satyrus from 

 Damaraland. 



No little speculation has been indulged in with regard to the 

 identity of H. satyrus, Boh. ; this point can now be set at rest, 

 because through the courtesy of Professor Chr. Aurivilius I have 

 been able to examine the unique type of H. f annus. Boh. 



* I have since these lines were written received this species from Southern 

 Rhodesia. 



