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



and there is a frontal carina ; prothorax elongate, not ampliate 

 laterally, marginate in front and laterally but not distinctly along the 

 base which is arcuate and slightly depressed at middle, it is plane 

 and smooth except for a few lateral punctures on each side of the 

 anterior part ; elytra elongate, slightly ampliate laterally near the 

 humeral part, and attenuate from there towards the apex, they are 

 plane, narrowly striate, the striae are not distinctly geminate and are 

 clearly punctured, the intervals are plane, impunctate, and glabrous 

 except at the apical declivity where they are setulose ; pygidium 

 with a few scattered, deep punctures ; median part of metasternum 

 •entirely smooth ; inner part of anterior tibiae non-spinose at tip, 

 apical spur nearly straight in both sexes. 



Male : Frontal carina only slightly indicated, median parts of 

 vertex provided with a carina extending from eye to eye, sinuate 

 laterally and produced in the centre into a moderately short triangular 

 tooth, compressed at base and sharp at tip ; anterior part of pro- 

 thorax slightly impressed in the centre ; in the smaller development 

 the frontal carina is more raised, and the carina on the vertex is 

 sub-dentate in the centre. 



Female : Clypeus a little less semicircular at tip ; frontal carina 

 very distinct, carina on vertex not dentate. 



Length 8-10 mm. ; width 5-5J mm. 



Hab. Mozambique (Rikatla, Tette and Sena, teste Klug), 

 Southern Ehodesia (Victoria Falls, Middle Limpopo Eiver), Trans- 

 vaal (Potchefstroom, Waterberg, eTohannesburg) ; also German East 

 Africa. 



This species is easily distinguished from the other South African 

 species by its depressed and elongate form which makes it somewhat 

 resemble Oniticellus planatus. The third joint of labial palpi is 

 very minute, almost indistinct. 



Onthophagus gikaffa, Hausm., 



Plate XXXV., fig. 26. 



Illig. Mag., vi., 1807. 



0. platycerus, Wiedem., Zool. Mag., ii., 1, p. 15. 



Black, opaque, very briefly pubescent on the upper side ; genae 

 rounded, clypeus a little sinuate laterally, head punctate, plicate in 

 the clypeus, and having a frontal carina in both sexes ; prothorax 

 marginate laterally, but less distinctly along the base the centre of 

 which is rounded but projects a little, not very convex, covered 

 with closely set punctures which are somewhat scabrose on the 



