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



Key to the S'pccies. 



FIRST SECTION. 



A-. Anterior tibite very long, curved at apex and produced in- 

 wardly in a very distinct mucronate process. 



Anterior tibiae strongly curved at tip, and having a con- 

 spicuous inner process, frontal carina very slight, vertex 

 produced into a short, truncate basal tooth, whole surface 

 very distinctly granular hems. 



Anterior tihise with a long, inner, truncate spine longer 

 than the apical spur, head with a frontal carina and two 

 curved horns on the vertex gazella. 



SECOND SECTION. 



A^. Anterior tibioe not very long nor curved at apex. 



B-. Metasternum not aculeate, apical spur not strongly 

 curved inwardly at tip in the female. 

 C". Head with one horn more or less curved, and more or 

 less long. 

 a^. Clypeus semicircular, not recurved at tip. 

 b5. Head with a long, recurved horn and two long, com- 

 pressed horns on the prothorax. 

 C-. Inner part of anterior tibiae spinose at tip. 



Prothorax with two small tubercles in the median 



part of the disk (pi. xxxv., fig. 15) suh-cxtensus. 



Prothorax without any tubercle in the median part 



of the disk (pi. xxxv. fig. 16) lanista. 



c\ Inner part of anterior tibite non -spinose at tip. 



Horns of the prothorax very long and situated near 



the apical margin of the prothorax tricornigcr. 



Median part of the cavity of the prothorax produced 

 into a sharp, triangular tubercle on each side 

 (pi. xxxv., fig. IS) insignis. 



6-*. Head with a long, cephalic horn and no prothoracic 

 tubercles or cavity. 



(1) Inner part of anterior tibise spinose at tip. 



Cephalic horn long, curved, bifid at tip, elytra 



(pi. xxxv., fig. 18) loricatus. 



(2) Inner part of anterior tibial non-spinose at tip. 

 (1-. Colouration metallic, shining. 



Head and prothorax green ; prothorax granulose, 

 depressed in front ; elytra flavescent or testaceous, 

 pygidium clothed with long, silvery hairs ; horn 

 curved back (pi. xxxv., fig. 19) Icucopygiis. 



