620 Transactions South African Philosophical Society, [vol. xm. 



punctate, narrowly but slightly impressed longitudinally behind with 

 the centre of the base projecting. 



Female' Clypeus arcuate but projecting in the centre of the curve, 

 not sinuate there, roughly and irregularly pitted with the intervals 

 or walls very plainly but not continuously carinate ; the anterior 

 frontal carina is quite straight, thicker and more raised than in the 

 S ; on the vertex or close to it is another sharp, short carina, and 

 between the two, two erect, slightly slanting backwards, sub-vertical 

 horns, slightly shorter than the whole head, thick at the base and 

 gradually tapering towards the apex, the vertex is quite smooth in 

 the centre ; the prothorax is covered with granules for about two- 

 thirds of the length, and with simple punctures in the remaining 

 posterior part, both granules and punctures being closely set ; the 

 anterior part is sloping, and on the top of the somewhat declivous 

 slope is a median smooth ridge the apex of which slants forward. In 

 both sexes the elytra, which are at their greatest width not broader 

 than the prothorax at its widest part, are very narrowly and shallowly 

 sub-geminate punctate ; the intervals, the two juxta-sutural ones of 

 which are narrower than the other three dorsal ones, bear several 

 irregular series of very shallow, simple punctures. 



Length 13-14 mm. ; width 7^-8 mm. 



This species was described on female examples from East Central 

 Africa. It is recorded from N'Gamiland by d'Orbigny. My examples 

 come from Southern Rhodesia (Sebakwe). There is, I think, little 

 doubt that Fahraeus (Insecta Caffr., ii., p. 263) mistook this species 

 for O.porrectus, Reich., to which it is certainly very closely allied. 



Onthophagus (Proag.) tersidorsis, d'Orbign. 

 Ann. Soc. Ent. Fr„ Ixxi., 1902, p. 281. 



" Totally shiny, head and thorax bluish green, elytra brick-red, 

 fuscous and greenish blue at the base, suture green, sides and apex 

 metallic green ; pygidium metallic green or greenish testaceous, 

 clothed with long pale setose hairs in the anterior part of the head, 

 glabrous on the prothorax except on the anterior part and on the 

 sides which are pubescent, very briefly fuscous setose on the elytra, 

 apex and pygidium with long, pale hairs. Head granulate, clypeus 

 rounded, in the <? the frontal part is not very indistinctly carinate, 

 and the vertex is armed with a long, erect and slightly arcuate horn, 

 occasionally short ; in the J the frontal part is carinate, and the 

 vertex bears an inversely arcuate carina angular on each side 

 and situated between the anterior margin of the eyes ; prothorax 

 smooth, sparsely asperate punctate in front, granulate laterally, 



