1900.] Catalogue of the Coleoptera of South Africa. 217 



into a laminate vertical process broadly furcate at tip, and higher 

 than the culminating part of the prothorax ; prothorax convex, 

 moderately retuse in front, densely granulose, and having a very 

 distinct, median longitudinal groove reaching from the apex of the 

 anterior declivity to the base ; elytra moderately ampliate laterally, 

 geminato-striate, intervals plane, densely pubescent, and having two 

 series of scabrose punctures ; pygidium scabroso-punctate ; meta- 

 sternum callose at tip, covered with deep punctures scattered all over 

 the median part which has also a sub-basal impressed longitudinal 

 line ; anterior tibiae of male non-spinose inwardly, apical spur nearly 

 straight. 



Female : The female differs from the male in the absence of a 

 cephalic horn, and it has instead a short, transverse ridge. 



The shape of the cephalic horn in the male is not unlike that of 

 0. emeritus (pi. xxxv., fig. 31), but it occupies the whole base of the 

 head, and is thus triangular, then narrow and parallel, and from 

 there broadly bifurcate. 



Length 4-| mm. ; width 3 mm. 



Hah. Mozambique (Sena). 



Onthophagus interstitialis, Fahr., 

 Plate XXXV., fig. 36. 

 Insect. Caffrar., ii., p. 282. 



Fusco-seneous, seldom with a greenish tinge on the elytra, head 

 and prothorax hardly pubescent; head closely punctulate, genae nearly 

 straight, clypeus elongate, rounded laterally, obtuse and slightly 

 emarginate at tip, and with the edge slightly recurved, two frontal 

 carinse, except in the large development of the male ; antennae 

 fiavescent ; prothorax moderately convex, marginate all round, 

 slightly sinuate at base near the median part, more or less retuse in 

 front according to sex, closely punctate and having a slight, median 

 impression near the base ; elytra a little elongate, narrowly geminato- 

 striate, intervals plane and with three series of not closely set 

 punctures, second interval broader than the third, humeral callus 

 distinct ; pygidium deeply punctured ; median part of the metasternum 

 almost entirely smooth except in the anterior part, impressed line 

 distinct from base to middle. 



Male : A frontal horse-shoe shaped carina abutting on the two horns 

 which are placed near the base, are upright but slightly curved 

 backwards at tip, and are united at the base by a tri-dentate carina ; 

 prothorax moderately abruptly declivous in the anterior part, but 



