338 Transactions South African PJiilosopltical Society, [vol. xn. 



punctate, intervals hardly convex, and very abundantly punctulate ; 

 metasternum with a very distinct median, longitudinal groove. 



Length 24-26 mm. ; width 14^-15 mm. 



The female has a transverse frontal carina briefly tuberculate in 

 the centre ; the prothorax is entirely granulose, there is no median 

 anterior carina, the median longitudinal sulcus is short but distinct, 

 and there is on each side of it near the base a slight elevation not 

 more shining, however, than the rest of the surface. 



In general appearance this species much resembles the small 

 development of C. melancholicus, the shape of the cephalic horn and 

 of the prothorax being nearly the same, but the clypeus is not 

 bi-lobate and refiexed at apex ; the granules on the prothorax are 

 not so asperous, but are more closely set, the elytra are more deeply 

 striate, and are not opaque black. 



Hab. Transvaal (Potchefstroom, Zoutpansberg (Mphone), teste 

 Kolbe). 



Cathaksius opacus, Waterh., 



Plate XXXIII., figs. 6, 6a. 



Annals and Mag. Natur. Hist., 1891, p. 510. 



C. cephalotes, P(^r., Trans. S. Afric. Phil. Soc, vol. 1892, p. 27. 



Black, quite opaque. 



Male : Head nearly twice as broad as long, clypeus deeply emarginate 

 in the centre and with the two angles of the emargination projecting 

 distinctly, sinuate on each side of the emargination and slightly 

 recurved, gena^ in a line with that of the clypeus laterally, it is 

 closely granulate and bears a short, sub-conical tooth about 1 mm. 

 high, situated somewhat behind in a line with the suture of the genae 

 and the clypeus, the suture not being produced into a carina along 

 the cephalic horn, nor behind it ; prothorax having in front a shallow, 

 round, median excavation, totally wanting in the small development, 

 it is very closely granulose, the anterior angles are very rounded, and 

 the lateral impression is hardly distinct, or entirely wanting; elytra 

 very convex, punctato-striate, the eighth stria is carinate from the 

 base to the rounding of the posterior part ; under side and legs 

 glabrous ; club of antennoB flavescent. 



Female : Like the male ; the head bears also a very short conical 

 tooth, but the prothorax is not impressed in the anterior part. 



In some examples from Lower Ehodesia tbe cephalic horn is a 

 little longer and compressed. 



Length 11-14 mm. ; width 7-8|- mm. 



