1900.] Catalogue of the Colcoptera of South Africa. 249 



pubescence silky white, the geose are nearly straight, but rounded 

 at tip, the clypeus itself is short ; prothorax convex, broadly ampliate 

 laterally at middle, and conspicuously emarginate at a short distance 

 from the basal angle, it is closely granulose, very briefly pubescent, 

 has a dorsal, median longitudinal impression, is marginate laterally 

 and in front, but not along the base the median part of which is 

 depressed and produced into a broad and sharp triangle ; elytra very 

 little convex, ampliated below the shoulder, and very distinctly 

 attenuate from there towards the apex, the striae are not deep, nor 

 distinctly geminate, the intervals are plane, covered with minute, 

 extremely closely set granules which are very briefly setigerous, the 

 suture is smooth and raised ; the second interval is more than twice 

 as broad as the third one, and has a trace of a rudimentary stria, 

 and the fourth is also broader than the third ; pygidium finely 

 granular and clothed with dense, long, silky white hairs ; metasternum 

 with a very broad median smooth longitudinal space, and showing a 

 faint trace of a median, basal groove only near the base. 



Male : Clypeus slightly sinuate laterally, nearly straight at tip 

 but showing a slight sinuation, frontal carina very slight, median 

 part of vertex developed as a high transverse ridge with a short 

 triangular spine in the middle and emitting on each side a long, 

 recumbent flattened curved horn reaching further than the base of 

 the prothorax, broadly dilated at tip in a sub-triangular, compressed 

 process, and emitting at about one-third of the length from the base 

 a short, inner ramus ; prothorax very sloping in the anterior part, 

 but not excavate, and having a distinct median longitudinal, broad 

 but not deep furrow with a short, sharp tubercle on each side of i 

 in the anterior part, followed by a blunt tubercle, which is not 

 always present ; elytra with the humeral angle produced into a 

 vertical, triangular, very high tubercle hollowed inwardly ; anterior 

 tibiaB with a long, inner spine, a little shorter than the apical spur 

 w^hich is moderately slender and curves slightly outward. In the 

 smaller development (fig. Qa) the cephalic horn varies much in 

 length, and is sometimes reduced to a mere crescent the points of 

 which barely reach the two tubercles in the anterior part of the 

 prothorax ; in the intermediate development, the horns which do 

 not reach the base of the prothorax, are not dilated at apex, and the 

 humeral tubercle, although distinct is not so high ; in the great 

 development the anterior and median part of the prothorax is less 

 closely granular and sometimes nearly quite smooth. 



Female : Clypeus gradually narrowed laterally to the tip which is 

 rounded, frontal carina arcuate, very distinct, carina on the vertex 

 slightly arcuate, much raised and dentate at each end and at middle ; 



