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



Keij to the Species. 

 FIRST SECTION. 



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

 wardly in a very distinct niucronate process. 



Anterior tibite 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 lierns. 



Anterior tibite with a long, inner, truncate spine longer 

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

 curved horns on the vertex (jazella. 



SECOND SECTION. 



A'. Anterior tibite not very long nor curved at apex. 



B-. ]Metasternuni 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. 

 (1-. Clypeus semicircular, not recurved at tip. 

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

 pressed horns on the prothorax. 

 C-. Inner part of anterior tibise spinosc at tip. 



Prothorax witli two small tubercles in the median 



part of the disk (pi. XXXV., fig. 15) snh-cxiensns. 



Prothorax without any tubercle in the median part 



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



c'. Inner part of anterior tibia3 non-spinosc 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. IH) Insignis. 



/;■•. 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 tibia; non-spinose at tip. 

 (i-. Colouration metallic, shining. 



Head and prothorax green; prothoiax granulose, 

 depressed in front ; elytra flavescent or testaceous, 

 pygidium clothed with long, silvery hairs; horn 

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



I 



