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



with the suture hlack, three black spots arranged transversely at 

 some distance from the base between the suture and the fourth 

 interval, and three larger macules partly connected occasionally in 

 the posterior part midway between the middle and the apex ; 

 antennae flavous ; clypeus sub-triangular, obtuse or very slightly 

 emarginate at the narrowed apex, and with the angles of the emargi- 

 nation not projecting, yet not blunt, the genae continue the line of 

 the clypeus and are angular in the median part, there is no clypeal 

 or frontal suture or carina, but the very margin of the vertex is 

 sharply marginate, the whole surface is covered with uniform, equi- 

 distant, simple punctures separated by an interval nearly equal to 

 their own diameter ; prothorax simple, somewhat convex, sloping 

 Eorward, plainly sinuate laterally behind, the basal angle rounded 

 and the base, which is somewhat angular in the centre, completely 

 marginate, there is a very slight elongated impression in the central 

 posterior part of the disk, the whole surface of which is covered by 

 greatly elongated granules set extremely closely to each other ; 

 elytra very shallowly geminate striate, the intervals plane, of equal 

 width in the dorsal part, and with two series each of shallow acicu- 

 lations ; pygidium glabrous, covered with deep, sub-fossulate but 

 small sub-contiguous somewhat rugose punctures, basal margin 

 plainly angular in the centre ; anterior tibiae hardly more than 

 angular inwardly ; spur thick and plainly hooked inwardly. 



Length 4£-o mm. ; width 3 mm. 



Originally recorded from the Transvaal (Christiana), is noted by 

 d'Orbigny from Lake N'Gami. My examples are from Southern 

 Rhodesia (Bulawayo). 



This species is characterised by the head being without suture or 

 carina and the base of the prothorax being somewhat angular in the 

 centre. 



Onthophagub macrothorax, d'Orb., 

 Ann. Soc. Ent. Fr., lxxi., 1902, p. 119. 

 " Somewhat shiny, head and prothorax obscurely cyaneous green, 

 elytra black, maculated with testaceous at the base, pygidium greenish 

 black, upper side very briefly flavous pubescent. Head very short, 

 granulate, clypeus strongly bi-dentate, the genae strongly dilated and 

 sub-angular ; frontal part with a short, arcuate carina highly raised, 

 vertex with a fine ridge situated behind the posterior margin of the 

 eyes; prothorax ample, uniformly densely granulate, not depressed 

 above the posterior angles, transversely bi-tuberculate in front, 

 posterior part of the sides strongly sinuate, base sub-angularly pro- 

 duced and not distinctly marginate ; elytra not longer than the 



