642 Transactions South African Philosophical Society, [vol. xiii. 



carinate on the anterior and lateral margins, and having in front of 

 the anterior angle of the genae three highly raised, sharp triangular 

 teeth set transversely in a row, hind part of the head slightly 

 depressed in the centre and quite smooth ; prothorax with an 

 anterior semi-circular, moderately deep cavity not prolonged into 

 a groove on the dorsal part, faintly plicate at the base, but other- 

 wise quite smooth ; on each side of the cavity are a few shallow, 

 agglomerated punctures, but the sides except for a few semi-seriate, 

 fine punctures along the margin, and almost the whole dorsal part 

 from the top of the cavity to the base, are smooth ; in the centre of 

 the disk is a small, impressed line reaching the base, but not the 

 cavity ; scutellum with a few very indistinct punctures at about 

 the central part ; elytra firmly punctate striate ; the lateral striae 

 obliterated from the base to about one-third of the length, the first 

 seven dorsal striae only reaching the base, the others are obliterated 

 slantingly, that is to say, the eighth and ninth reach nearer the base 

 than the others, and so on, the supra-marginal ones and those next 

 to them being obliterated for about two-thirds of their length. 



Length 12 mm. ; width 8 mm. 



This species is very closely allied to B. vacivum (Cat. i., p. 485) 

 which it should follow. It is larger, but the shape of the head with 

 the tri-dentate frontal part is similar, and the excavation of the 

 prothorax is not angular on each side at the apex, nor is it pro- 

 longed into a deep triangular depression reaching nearly to the base ; 

 the punctuation, however, is nearly the same. 



Hob. Southern Ehodesia (Plumtree). 



BOLBOCERAS SEBAKUENSE, n. sp. 



Male : Brick-red, shiny, glabrous on the upper side, femora, sides 

 of pronotum and gula densely hairy, the hairs long and fulvous ; 

 antennae flavous ; labrum with the edge slightly sinuose in the 

 centre, and with a distinct transverse ridge equi-distant from 

 the edge and from the transverse impression separating it from 

 anterior part of the clypeus which is carinate ; between the point 

 of insertion of the antennae, and equi-distant from the apex and the 

 triangular genae, is a ridge curving backwards, the two angles of 

 which are plainly raised and the centre slightly elevated, but less 

 so than the angles ; the anterior frontal part behind the ridge is 

 depressed, and at a short distance from the apex is a short, trans- 

 verse, very distinct carina ; the depressed frontal part and the sides 

 are very sparingly punctate ; prothorax very narrowly edged with 

 fuscous, slightly retuse in the centre of the very anterior part, the 



