314 Transactions South. African PliilosopJiical Societij. [vol. xii. 



late in the posterior part ; elytra very convex and tectiform owing to 

 the suture and adjacent parts being more raised than the median 

 part of the disk, and sloping towards it, they are moderately deeply 

 geminato-striate, and the intervals are filled with a shallow scrobicu- 

 lation, giving them a very coriaceous and distinct appearance ; 

 pygidium faintly punctate ; metasternum with a conspicuous basal 

 impression ; apical outer tooth of the anterior tibiae not truncate at 

 tip, curving outwardly in l)oth sexes, and without an inner apical 

 mucro. 



Male : Clypeus very deeply concave in the anterior part, diagonal 

 laterally and with the anterior part deeply emarginate with the 

 angles of the emargination sharp, the base of the clypeus and the 

 apex of the gense, which are quite straight, are produced on each side 

 into a compressed bi-sinuate horn either sub-vertical or directed back- 

 wards, and the length of which varies from 9 to 18 mm. ; prothorax 

 vertical in front and with the outer anterior angles produced into a 

 very long, aculeate process, while the median part of the disk is in the 

 shape of a triangular long process beginning at or near the posterior 

 angles and ending in a flat, sub-horizontal long horn truncate or 

 emarginate at tip, this median dorsal part is closely scrobiculate and 

 has on each side a smooth elongate patch near the base. In this 

 large development the anterior part of the disk of the elytra 

 slopes towards the base. In the small development the clypeus is 

 deeply impressed, but not concave, the apex of the genae has only a 

 very small tooth, and there is on the vertex a transverse, slightly 

 tri-dentate laminate carina resembling that of the female ; the 

 triangular process of the prothorax is comparatively short, sub- 

 bifid at tip, and has a small tooth on each side, thus resembling 

 very much that of H. hamadryas and H. satijrus. 



Female : Clypeus distinctly bi-sinuate on each side, truncate 

 arid very slightly emarginate at tip, genge straight, angular at apex, 

 cephalic transverse carina very distinctly tri-dentate, median tooth 

 longer and stronger than the two lateral ones ; prothorax sub- 

 vertical, apical part very distinctly carinate, the carina is strongly 

 sinuate on each side and has a conspicuous lateral triangular 

 tooth ; this carinate process slightly overhangs the retuse part in the 

 large development which often resembles the minor male one, but 

 the median part of the prothorax is not produced into a triangular 

 lobe. 



Length 44-59^ mm. ; width 26-34 mm. 



Hab. Cape Colony (Griqualand West), Transvaal (Kustenburg, 

 Lydenburg, Potchefstroom), Southern Rhodesia (Victoria Falls, 

 Buluwayo, Mazoe, Salisbury), Damaraland, Ovampoland. 



