224 Transactions South African PJiilosoj^hical Society, [vol. xii. 



Onthophagus yinctus, Erichs., 

 Wiegm. Arch., 1843, i., p. 233. 

 0. ohcsiis, Fahr., Ins. Caffr., ii., p. 298. 



Dark bronze, moderately shining, very briefly pubescent, outer 

 margin of elytra testaceous, humeral part also with a moderately 

 large spot of the same colour ; clypeus short, semicircular, a little 

 emarginate or incised at the tip, according to the sexes, frontal 

 carina hardly distinct, clypeus roughly punctured, vertex smooth ; 

 antennae flavescent ; prothorax hardly ampliate laterally in the 

 male, but a little more rounded in the female, little convex, 

 marginate laterally and in front, but not along the base, covered 

 with moderately deep punctures moderately closely set, and hav- 

 ing almost no trace of dorsal median line ; elytra elongate, very 

 little ampliate laterally, narrowly but deeply geminato-striate, 

 intervals plane and having two series of scabrose, briefly setigerous 

 punctures, second interval not wider than the third, humeral callus 

 very distinct ; pygidium with a few scattered, setigerous punctures ; 

 metasternum punctulate in the central part, impressed median line 

 distinct ; inner part of anterior tibiae more angular than spinose in 

 the male, apical spur long, nearly straight. 



Male : Clypeus emarginate ; vertex with two basal, conical, short 

 horns reduced in the smaller development to two blunt tubercles, or 

 even disappearing altogether ; anterior part of prothorax sub-retuse 

 and w^ith the apical margin distinctly bi- sinuate in the large develop- 

 ment and not at all in the smaller. 



Female : Clypeus incised ; vertex with a faint trace of two 

 tubercles ; prothorax simple. 



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



Hah. Cape Colony (Graham's Town, Griqualand West, Port St. 

 John), Natal (Estcourt, Durban). 



It is recorded from Zanzibar, Northern Massailand, Gallaland, 

 Guinea, and Senegal. 



Onthophagus insulsus, n. spec. 



Male : Black, shining, hardly pubescent ; clypeus semicircular, 

 very slightly emarginate at tip and with the edge hardly recurved, 

 covered with deep rugose punctures, the vertex is smooth, the 

 frontal carina is very faint, and in the base are two short conical 

 horns apart from one another ; prothorax moderately convex, not 

 ampliate laterally and nearly straight at middle, but rounded in 

 the anterior and posterior parts, not impressed longitudinally at 



