1900.J Catalogue of the Colcoptera of South Africa. 499 



eyes divided in front by the canthus of the genae ; eyes globose but 

 not showing as much in the upper part as on the under side ; 

 antennae ten-jointed, club tri-jointed, the joints long, ultimate one a 

 little concave ; prothorax a little aiTipliate laterally and more or less 

 obliquely attenuate towards the base, marginate, simple or deeply 

 excavate and having a faint supra-marginal lateral impression ; 

 scutellum ogival, moderately long ; elytra somewhat short, parallel, 

 rounded behind, convex, vaguely striate along the sutural part and 

 very indistinctly on the discoidal part, and irregularly pitted ; 

 pygidium uncovered, nearly vertical ; abdominal segments, with the 

 exception of the penultimate one, narrow ; intermediate and posterior 

 coxae nearly contiguous, very broad, lamelliform, the intermediate ones 

 strongly carinate along the median sulcus ; metasternum narrow and 

 not projecting beyond the base of the median coxae ; legs robust ; 

 anterior tibiae strongly tri-dentate outwardly, obliquely truncate 

 inwardly and without apical spur in the male ; intermediate and 

 posterior dilated, bi-carinate and uni-dentate transversely on the upper 

 side, truncate at tip where they are stiffly bristly, they are com- 

 pressed and the apical spurs, w^hich in the posterior legs are set in 

 the median part of the inner margin on each side of the tarsus, not 

 at the angle, are very long and sharp and of nearly equal size. 



The head and prothorax are simple in the female, but in the male 

 the head bears a sharp vertical horn in the anterior part, and the 

 prothorax is more or less deeply excavated with the walls of the 

 excavation often vertical ; the valves of the penis are symmetrical 

 {plate xxxviii., fig. 37), they vary slightly in the different species, 

 being more or less deeply emarginate inwardly and outwardly, but 

 this difference is very slight, and is referred to here merely on account 

 •of the great similarity in the outward characters. 



In South Africa the species are usually caught at camp-fires. 

 The genus is represented in India and Ceylon, and in Africa 

 it occurs in Senegal, Abyssinia, Gallaland, and East German 

 Africa, and also in Madagascar. All the African species are very 

 much alike, and the greater or less development of the cephalic 

 horn and of the prothoracic cavity enhances the difficulty of dis- 

 tinguishing between the species. 



Key to the Species. 



Ar. Walls of the prothoracic cavity of the male strongly sinuate, 

 bi-dentate. 

 a^. Colour brick-red or piceous red. 



Elytra foveolate and with only one juxta-sntural stria . . pugnax. 



