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



flavous with the suture black, antennae piceous red, club fuscous ; 

 head impunctate in the centre and base, but having a few deep, 

 round punctures on the clypeus which is sub-semicircular, but 

 deeply and narrowly emarginate at tip, gense rounded and bulging a 

 little, in the centre of the head there is a very well-defined, high, 

 arcuate frontal ridge, and a transverse one not higher than the 

 frontal one along the base ; prothorax plane, very little ampliate 

 laterally and not rounded in the middle, impunctate except for a few 

 punctures on the anterior sides, marginate all round and with the 

 base arcuate ; elytra elongato-ovate, and having series of fine punc- 

 tures instead of geminate striae, intervals plane and impunctate, 

 second interval not wider than the third, humeral callus indistinct ; 

 pygidium with a few, deep, scattered punctures ; metasternum 

 smooth in the centre, without an impressed line but having a very 

 shallow elongate basal impression ; inner part of anterior tibiae 

 strongly dentate inwardly at tip in the male ; apical spur moderately 

 slender, nearly straight in both sexes. 



The distinctive characters between this species and 0. hi-plagiatus 

 consist in the more elongated and more flattened shape of the pro- 

 thorax which is very faintly punctulate laterally in the anterior part 

 instead of being deeply pitted there as in the latter, and the meta- 

 sternum has only a slight, elongate basal impression instead of a 

 broad and deep round one. 



Length 5-6^ mm. ; width 3-4 mm. 



Hab. Natal (Durban), Transvaal (Potchefstroom, Pretoria, Eus- 

 'tenberg), Southern Ehodesia (Salisbury, Victoria Falls). 



Onthophagus semiflavus, Bohem., 

 Ofv. Vet. Akad. Forhandl., 1860, p. 113. 



Dark bronze, nearly black underneath, elytra very pale flavous, 

 nearly ivory white ; genae rounded, auriculate ; clypeus short, 

 rounded, a little sinuate laterally before the apical part where it is 

 obtuse, and very distinctly emarginate with the angles of the emar- 

 gination rounded ; it has a few scattered, deep punctures, and there 

 are a few granules in the centre of the vertex, the frontal carina is 

 distinct and arcuate, the juxta-basal one is as high as the frontal, and 

 extends the whole length of the base ; prothorax moderately convex 

 ampliate laterally, rounded at base, distinctly marginate all round, 

 and sprinkled with remote, deep punctures all over the surface,; 

 elytra finely striate, striae punctate but apparently not geminate, 



