Coleoptera from South Africa. 159 



impressed in the middle of the anterior part ; elytra convex, 

 punctured, grooved along the suture and the outer margins. 

 Length 7, width 4 mm. 



Hah. Ovampo Land (Omramba). 



Smaller than 0. mashnmis, with the cephalic horn 

 almost similar ; the excavation of the prothorax is shal- 

 lower, does not extend so far back, and the ridges are 

 still less raised. 



0. jyiignax, n. sp. 



Brick-red, or at times piceous-brown ; head of the $ with a 

 long central, sharp, conical horn ; prothorax very deeply excavated 

 from base to apex, with the lateral walls of the excavation pro- 

 duced in two sharp points, an anterior and a median one, the 

 latter a little more raised than the anterior, but less acute ; in the 

 $ the prothorax is a little raised cii'cularly above the apical 

 margin, and has a small longitudinal impression in the middle ; 

 elytra convex, faintly striate in the anterior part, but not laterally, 

 and set with rough, confluent punctures almost alveolate on the 

 disk. Length 5-o|, width ','}~?>^ mm. 



Hah. Zambezia (Salisbury). 



A little smaller and proportionally less massive than 

 0. rufalus, Boh., and at once distinguished from it by 

 the shape of the prothorax, which in the latter is also 

 deeply excavated, but with the walls produced in one 

 long conical tubercle on each side, while there are two 

 in 0. ijugnax; the punctuation of the elytra is also much 

 deeper and rougher than in 0. rufidus. 



GEOTRUPIDES. 



Gen. BoLBOCERAS, Kirby. 



B. jjama, n. sp. 



Brick- or ferruginous-red, shining ; clypeus short, deeply emar- 

 ginate ; head very closely and deeply punctured, with a short, 

 transverse sub-apical carina in both sexes ; prothorax dehiscent in 

 the (J from apex to base, deeply sinuate in the anterior margin 

 on each side, the apical margin raised in a carina, and having 

 along the basal part five sharp, conspicuous tubercles, the two 

 outer ones of which are sometimes produced in a long incurved 

 process, while the three median ones are shorter and near one 

 another (in those specimens in which the lateral tubercle is 



