1908.] Catalogue of the Colcoptcra of South Africa. 641 



with a short, shallow, retuse, triangular impression in the anterior 

 part, limited behind by a smooth sub-arcuate space, covered with 

 round punctures, smaller and closely set in the anterior depres- 

 sion, fairly closely set on the sides, but becoming a little more 

 remote towards the median part of the disk ; over the base is an 

 impunctate, transverse area, slightly longer than broad, and in the 

 centre of the posterior part a faint sulcus with one series of punc- 

 tures ; scutellum punctured, the punctures round and more closely 

 set and deeper than those found on the prothorax, but slightly 

 smaller ; elytra finely punctate-striate, intervals smooth, plane ; 

 anterior tibiae six-dentate. 



This species is not unlike the female of B. consocium and of B. 

 pannosum, but it is easily distinguished by its six-dentate anterior 

 tibiae ; in the two above-named species the tibiae are seven-dentate. 



Length 12 mm. ; width 8 mm. 



Hah. Cape Colony (Vryburg). 



BoLBOCERAS EXASPERANS, n. Sp. 



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

 underneath, the villosity fulvous ; antennae flavous ; labrum simple, 

 anterior edge not arcuate, edge of clypeus carinate ; in the anterior 

 part, and in a line with the point of insertion of antennae is a small 

 median tubercle without transverse ridge, the frontal part is not 

 depressed, and the whole surface is covered with deep, closely-set, 

 irregular and somewhat confluent punctures ; prothorax with a 

 median, sub-ovate impression or shallow cavity in the centre 

 of the anterior part, moderately closely punctate in the sides, 

 less so in the immediate neighbourhood of the cavity which reaches 

 from the apex to slightly past the median part, and sparingly in the 

 central posterior part, along the basal margin is a series of short, 

 closely-set punctures ; scutellum impunctate ; elytra slightly lighter 

 in colour than the prothorax, closely and deeply punctate striate, 

 intervals smooth, not raised; under side closely aciculate ; femora 

 smooth except on the edges ; anterior tibiae six-dentate. 



Length 7-9 mm. ; width 4|-5i- mm. 



Hab. Transvaal (Waterberg) ; Damaraland. 



This species closely approximates B. -pannosum and B. consocium 

 (Catal. L, pp. 488, 489), but the tibiae are seven-dentate in these two 

 species. 



BoLBOCERAS INDIGUM, 11. sp. 



Brick-red, very shiny ; labrum moderately arcuately emarginate, 

 frontal part in the shape of an inverted truncate pyramid, sharply 



