210 Transactions South African Philosophical Society, [vol. xii. 



O. mrus ; the prothorax is not excavated in the anterior part, and 

 ■at the apex of the anterior dechvity there is a small tubercle 



truncate at tip. 



Female : Clypeus more acuminate in front than in the male, 

 ■and with the edge less recurved, frontal carina entire, semicircular, 

 vertex produced as a tri-dentate high carina ; prothorax declivous in 

 front, not excavated and having at the top of the declivity two 

 coalescing, flattened tubercles forming a narrow ridge which is 

 emarginate in the centre. 



Length 11-14 mm. ; width 7-9 mm. 



Hah. Southern Ehodesia (Sahsbury). Was originally described 

 from German East Africa (Mamboia). 



Onthophagus mekus, n. spec, 

 Plate XXXV., tig. 38. 



Piceous black, shining, very briefly pubescent ; head roughly 

 punctulate in the clypeus, and nearly smooth on the vertex, clypeus 

 diagonally elongate, deeply emarginate at tip, and with the angles of 

 the^'emargination sharp, long, and slightly recurved, no frontal carina ; 

 prothorax marginate all round, convex, with the base rounded, a 

 little declivous behind and having at the top of the centre of the 

 dechvity a short, longitudinal cariniform tubercle, it is covered 

 with deep, not closely set punctures ; elytra ampliato-ovate, finely 

 geminato-striate, intervals plane and having two series of somewhat 

 deep, setigerous punctures ; pygidium deeply pitted ; metasternum 

 sparsely punctate, basal longitudinal hne distinct ; inner part of 

 anterior tibite of male briefly spinose, spur nearly straight in both 



sexes. 



Male: Clypeus more elongate than in the female and with the 

 angles of the incision sharper and more recurved, vertex with a 

 sub-laimnate process produced as two divaricating horns sHghtly 

 curving inwards, and a small inner tooth at the base (not as long as 

 depicted in the fig., but more in the manner of 0. intermedins, 

 fig. 40a) ; the prothorax has two impressions in the anterior part. 



Female: Vertex of head with a transverse, nearly straight 

 laminate carina truncate on both sides, but placed where the frontal 

 carina should be ; prothorax with the same median, cariniform 

 tubercle as in the male, but without any impression. 



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



Hab. Cape Colony (Kimberley), Southern Ehodesia (Lesappi 

 Eiver). 



