220 Transactions South African PJiilosopJiical Society, [vol. xii. 



laminate carina slightly arcuate, extending across the whole width, and 

 not quite truncate laterally ; prothorax not quite as retuse as in the 

 male, less deeply impressed laterally in the anterior part, obtusely 

 bi-tuberculate in the centre and with a faint trace of a more obsolete 

 tubercle on each side of the two median ones. 



Length 8-10 mm. ; width 5-6 mm. 



Hah. Cape Colony (Cape Town, Malmesbury, Stellenbosch, Wor- 

 cester, Namaqualand). 



Onthophagus vitulus, Fabr., 



Plate XXXV., fig. 37. 



Ent. Syst. suppl., p. 82 ; Syst. Eleuth., i., p. 48. 



0. immundiLS, Bohem., Kes. Eugen., 1858, p. 49. 



Black, opaque, briefly but densely pubescent ; head roughly 

 punctured on the clypeus, sparsely on the vertex, a frontal carina, 

 which, however, disappears in the large development of the male, 

 clypeus diagonal laterally, emarginate at apex, edge not recurved ; 

 antennae piceous red, club fuscous ; prothorax moderately ampiiate 

 laterally, marginate all round, basal part rounded, covered with 

 very closely set punctures ; antennae not very ampiiate, distinctly 

 geminato-striate, striae punctured, intervals plane, finely aciculate 

 and having each two series of not closely set, minute, slightly 

 shining setigerous granules, metasternum punctulate in the middle 

 and with a longitudinal impressed line ; inner part of anterior tibiae 

 very briefly spinose in the male, apical spur of anterior tibiee nearly 

 straight in both sexes. 



Male : Vertex produced in tw^o long sub-cylindrical horns, sub- 

 obtuse at tip, a little reclining, and united at base by a carina slightly 

 ■dentate in the centre in the large development where the horns 

 are higher than or as high as the top of the prothorax which is very 

 •deeply excavated and smooth in the centre of the anterior part, the 

 latter having a very long slope ; the depth and length of the 

 excavation is in proportion to the length of the cephalic horns, and 

 in the minor development, where the horns are very short and sharp 

 at tip, there is no excavation whatever. 



Female : Frontal carina very distinct and arcuate, vertex with a 

 transverse, sub-basal carina not very much more raised than the 

 frontal one ; no impression in the anterior part of the prothorax. 



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



Hah. Cape Colony (Cape Town, Stellenbosch, Worcester, Paarl, 

 Malmesbury). 



