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



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

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

 narrower than in fig. 33. 



Key to tlie Species. 

 Elytra of male without any basal tubercles. | 



Clypeus truncate and emarginate at tip, elytra very distinctly 

 shagreened ; clypeus of <? 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) !7'!7f's. 



Clypeus of <? 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 j' , 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, 6a) anterior. 



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

 the fifth interval of the elytra. 



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

 blunt at tip, angle of genss 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 cariiaa (pi. xxxii., fig. 8) japetus. 



Genae diagonal, with the anterior angle sharply toothed ; i 



