312 Transactions South African Philosophical Society, [vol. xii. 



(plate xxxix., figs. 32, 33), or in the group of H. eryx, H. jupiter, 

 H. marshalli, &c., the apical part is nearly vertical, and sharper and 

 narrower than in fig. 33. 



Key to the Species. 

 3, Elytra of male without any basal tubercles. 



Clypeus truncate and emarginate at tip, elytra very distinctly 

 shagreened ; clypeus of c? concave, basal angle of clypeus pro- 

 duced into two long or very long horns in the great and 

 medium development, anterior angles of prothorax very long 

 and angular, median part of prothorax produced into a long, 

 sub-horizontal horn (pi. xxxii., figs. 7, la) O^gcis. 



Clypeus of s with four strong teeth, the lateral ones shorter 

 than the apical ; prothorax with a five-horned process, the lateral 

 horns short, and the median one long and truncate at tip . . dilloni. 



Clypeus semicircular in the $ , and with the base of the 

 clypeus produced in a sharp, short, triangular process; anterior 

 part of head with a short or moderately long horn ; prothorax 

 with a median process furcate at tip, directed downwards, and 

 having a sharp, angular tooth on each side of it ; ? clypeus 

 ;acuminate, obtuse at tip, head with a transverse, post median 

 laminate carina ; prothorax with a strong, bi-sinuate transverse 

 ridge (pi. xxxii., fig. 2) pirmal. 



Clypeus semicircular, bi-sinuate laterally, a little obtuse at 

 tip, slightly emarginate there, basal angle distinct but not 

 dentate ; elytra smooth ; prothorax of <? with a sharp trans- 

 verse carina overhanging a little the retuse part, as well as the 

 lateral excavation, head with a distinctly tri-dentate transverse 

 lamina ; ? carina on the head not tri-dentate, prothorax not 

 excavated laterally, and having in front a distinct, sinuate ridge 

 (pi. xxxii., figs. 6, 6<x) anterior. 



k.^. Elytra of male with a sub-basal, short, longitudinal carina on 

 the fifth interval of the elytra. 



Head of d straight laterally, clypeus a little elongate, slightly 

 blunt at tip, angle of gense with clypeus not prominent, head 

 with a transverse, laminate carina with the angles sharp ; 

 prothorax deeply excavate, sharply carinate in the anterior 

 part, carina deeply emarginate laterally and bi-dentate above 

 the excavation, anterior part vertical in the middle, and having 

 under the apical carina two very distinct, triangular, sub- 

 horizontal teeth ; ? clypeus elongate, head with a sub-median 

 transverse, laminate carina, anterior part of prothorax with a 

 bi-sinuate transverse carina (pi. xxxii., fig. 8) japctus. 



Gense diagonal, with the anterior angle sharply toothed ; <^ 



