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



part, impressed on each side near the posterior angles, broadly 

 depressed in front in the male, strongly tuberculate there and 

 depressed on each side in the female, the sides greatly sinuate 

 behind, base non-mai*ginate except for a narrow median part ; elytra 

 finely striate with the intervals plane, uniformly closely sub-rugose 

 punctate ; pygidium densely punctate. 



This species is extremely closely allied to 0. aruginosus, Roth, 

 (chalcostomus, Fahr.), the only difference being that the former is 

 more bronze or bronze-gi'een, sometimes bluish, and slightly smaller. 

 In the female the vertex bears a simple carina ; the anterior part of 

 the prothorax is less retuse, often without impression, and in the 

 female the tubercle is less projecting. 



Length 7-8^ mm. ; width 4^5 mm. 



Hob. Cape Colony (Kimberley, Vryburg) ; Southern Rhodesia 

 (Zambesi River, teste d'Orbigny). 



Onthophagus ^quepubens, d'Orbign., 

 Ann. Soc. Ent. Fr., 1905, p. 395. 

 Bronze-black, shiny or with the head and prothorax bronze-green ; 

 densely but briefly pubescent on the upper side ; antennal club 

 piceous ; <J clypeus somewhat elongated, deeply incised in the 

 centre with the angles of the incision sharply triangular and very 

 plainly refiexed, the anterior frontal part is simple, but near the 

 vertex and between the eyes rise two sharp, straight horns disunited 

 at the base, which stands in a line with nearly the posterior part of 

 the eyes ; both the clypeus and the frontal part are covered with 

 contiguous, deep fossule-like punctures which are growing shallower 

 towards the cephalic horns ; prothorax sub-gibbulose, briefly retuse 

 at the apex and having in the centre of this retuse part a very small 

 tubercle, covered with contiguous, deep setigerous punctures which 

 are slightly asperous in front and the sides, the posterior part of 

 which is plainly sinuate with the basal angle rounded, the base is 

 marginate, and there is a plain longitudinal, median sulcus in the 

 posterior part of the disk ; in the ? the clypeus is much less deeply 

 and sharply incised, at its junction with the frontal part is a short, 

 not much raised, strongly arcuate ridge, and in a line with the median 

 part of the eyes a high, vertical, laminate ridge in a line with the 

 eyes, and occupying one-half of the whole width ; the prothorax is 

 simple, more briefly pubescent than in the $ , and the base is 

 marginate in the median part only ; elytra narrowly striate and not 

 distinctly punctulate, intervals sub-tectiform and having two series 

 of deep, uneven, not very regular punctures bearing each a minute 



