1907.] Catalogue of the Coleoptera of South Africa. 529 



of the basal margin of the prosternum more or less distinctly 

 tuberculated. 



This species is subject to considerable variation in the colour of 

 the prothorax and elytra. In the neighbourhood of Cape Town, the 

 red and black ones are found together, and I have captured them 

 in coitu. G. dealbatus, Dist., is the northern representative of 

 G. hottentotus, and is found in the Northern Transvaal, but I cannot 

 consider it even as a variety. The shape of the genital clasps of 

 the male is absolutely the same in all three so-called species. 



Length 9^-13 mm. ; width 4-6 mm. 



Hab. Cape Colony (wherever Protcea mellifera and other allies 

 are found) ; Transvaal (Pretoria, Zoutpansberg). 



Genuchus nigriclavis, Bohem., 

 Ins. Caffr., ii., 1857, p. 51. 



Black, shiny, antennae black, but occasionally flavescent ; elytra 

 with a small median white patch on the second dorsal costae, and a 

 white lunule under the apical callus ; head with the anterior keel 

 very sharp and strongly dentate in the centre, posterior keel bi- 

 tuberculate ; the frontal impression is reticulate plicate, the posterior 

 part reticulate only ; prothorax nearly straight laterally, being 

 attenuated towards the apical part on]y but the posterior part is 

 broadly rounded, broadly impressed longitudinally in the centre, 

 and also, but less deeply, on each side of the disk the anterior part 

 and the sides of which are striolate reticulate, while the central and 

 posterior parts are covered with fossulate punctures somewhat 

 remote in the longitudinal impression ; scutellum striolate ; elytra 

 not broader than the prothorax, bi-costate on each side, striolate 

 punctate near the suture and with the two costae separated by a 

 geminate punctate stria, the whole surface is regularly and deeply 

 punctate ; pygidium foveolate punctate ; under side glabrous, deeply 

 punctate, the punctures almost cicatricose on the pectus; prosternum 

 with a long, vertical, tubercle-like process truncate at apex. 



I have seen an example from Ovampoland which differs from the 

 type form in having the antennal club navescent, an elongated white 

 patch on each of the two elytral costae, a much broader lunule at 

 apex ; and a small spot in the median part of the outer margin ; 

 the pygidium has a broad white patch on each side, and each 

 abdominal segment a minute one. This variety may be known as 

 G. nigriclavis, var. ova?npoensis. I have, however, seen one example 

 only, and the white markings of the Cremastochilides are very 

 variable. 



34 



