1900.1 Catalogue of the Cokoptcra of South Africa. 485 



tinct transverse sub-apical carina extending over the ^vhole widtli, 

 clypeus truncate at tip, short, sUghtly emarginate laterally, head 

 broadly impressed in the basal part and having in the anterior a 

 transverse, not much raised carina which is equi-distant from middle 

 and apex, and sharply dentate in the middle and on each side it the 

 basal part of the clypeus, the anterior part is roughly but not closely 

 punctate, and the posterior part is impunctate ; prothorax retuse in 

 front and with the apical margin bi-dentate at middle, the retuse part 

 is deeply impressed for more than half the width, the impression 

 being continued at tip as a triangular excavation reaching nearly to 

 the base, and very acutely angular on each side at the top of the 

 declivity, the surface is smooth except at the base of the impression 

 and along the median excavation as well as on a small area above the 

 lateral fossa where there are some round, shallow, not very closely 

 set punctures; elytra punctato-striate, punctures very closely set, 

 eighth and ninth striaj of equal length and reaching well on to the 

 humeral callus ; scutellum impunctate ; anterior tibiae six-dentate. 



Female : Eesembles the male, from which it can hardly be distin- 

 guished ; the three cephalic teeth are, however, much less raised ; 

 the impression of the prothorax as well as the upper excavation are 

 less deep, and the latter is not aculeate at the base. 



Length 10-12 mm. ; width 6-7 mm. 



Hah. Southern Rhodesia (Salisbury, Manica). 



BoLBOCERAS VACivuM, n. spec, 

 Plate XXXIX., figs. 6, 6fl. 



This species might easily be mistaken for a small example of 

 B. caffrum, but it differs in the labi'um not being transversely 

 carinate ; the three teeth on the head are similarly disposed, but not 

 united by a transverse carina; the impression on the prothorax, 

 although aculeate at apex in both sexes, is not so deep, and the shape 

 of the valves of the penis is different ; the colour is brick-red and 

 very shining. 



Length 8 mm. ; width 5-5^ mm. 



Hab. Southern Rhodesia (Salisbury). 



BOLBOCERAS INCHOATUM, n. SpeC. 



Female : Brick-red, head and prothorax ferruginous ; head very 

 roughly punctured, almost scrobiculate ; labrum slightly emarginate, 



