1900.] Catalogue of the Coleoptera of South Africa. 4:11 



Sub-Family GEOTEUPIN^. 



Maxillary lobes horny, not pubescent, maxillae uni- or bi-dentate 

 inwardly ; mandibles curved, laminate, projecting much beyond the 

 labrum, which is greatly developed and separated from the clypeus 

 by a distinct suture ; antennae eleven-jointed ; abdomen very short, 

 segments free ; all coxae ol^lique, contiguous ; elytra covering the 

 abdomen and with distinct epipleura. 



Gen. BOLBOCERAS, Kirby, 

 Trans. Linn. Soc, xii., p. 459. 



Mentum sub-orbicular, convex, ligula bi-lobate, long, moderately 

 broad, horny, and densely ciliate inwardly, basal joint of labial palpi 

 short, thick, second elongate, gradually thickened, obliquely truncate 

 at tip, third sub-fusiform ; maxillae thick, not much curved, apical 

 lobe not membranaceous, triangular, and fringed at tip with long, 

 rigid setae, inner lobe very short, also setulose, but soldered, and 

 having a sharp hamate tooth at base, inner part of the maxillae with 

 a hamate tooth at tip, close to the first ; joints of maxillary palpi 

 moderately long, penultimate one shorter than the second, last one 

 sub-fusiform inwardly, and sinuate for half the length outwardly ; 

 antennae 11-jointed, joints 3 to 6 inclusive, small, closely set, club 

 lenticular, first joint fitting against the last one and enclosing the 

 intermediate one ; labrum very well developed but not covering the 

 mandibles, which are circular, laminate, and have the upper outer 

 edge strongly reflexed, clypeus separated from the labrum by a 

 transverse impression or groove, genae forming a sharp canthus 

 dividing the eyes which are large and show less on the upper part 

 than on the under side, head carinate laterally above the eyes and 

 usually along the clypeus which is obliquely sinuate from the genae 

 to the apical part, where it is transverse ; the head is carinate or 

 tuberculate, and with the angle of the junction of the genae with the 

 clypeus often prominent or tuberculate, especially in the male ; 

 prothorax very broad and convex, declivous, and simply impressed 

 or impressed and tuberculate in the centre, or often simple, it is 

 marginate all round with the base sinuate above the humeral part, 

 attenuate laterally from past the median part towards the apex 

 and very ampliate in the posterior part, supra-lateral impression 

 more or less rounded, deep ; scutellum conspicuous, ogival ; elytra 

 very convex, not quite as broad as the prothorax, somewhat retuse 



