1900.] Cataloijue of the Colcoptera of South Africa. 345 



:\Iedian lobe modt'nitely broad, nearly straight, only 

 slightly emarginato in the centre, dorsal part smooth, 

 lateral horns of prothorax moderately long . . • . capensis. 



Median lobe broad, slightly tri-sinuate, dorsal part 

 deeply punctured, lateral horns of prothorax very 

 long (pi. xxxiii., fig. 14) anceus. 



a'. Median part of thorax bi-lobate. 



' Median lobe broadly incised and bluntly bifid on 

 each side, median, -sloping anterior part with a small 

 tubercle in the centre, a lateral, marginal tooth on 

 each side (pi. xxxiii., figs. 15, 19) elphenor. 



Median part of lobe produced in a long, bifid process 

 slightly dented inwardly at tip, no marginal tooth on 

 each side Jacclms. 



Median lobe arcuate, quadri-dentate, lateral part of 

 excavation strongly dentate at apex ; elytra very 

 globose glohuliprnnis. 



Xi. Prothorax very sloping in the anterior part and not excavate 

 laterally. 

 -B. Males with a cephalic horn. 



C-. Cephalic horn not laminate at base, and cylindrical at tip. 

 D?. Apical spurs of anterior tibise curving slightly out- 

 wards. V, 



Cephalic horn ensiform and with a very distinct 

 median compressed tooth behind ; prothorax with 

 two more or less strongly developed, diverging horns 

 beginning at a short distance from the base (pi. xxxiii., 

 figs. 2,2a) cornifruns. 



a'. Prothorax very deeply excavated longitudinally in the 

 centre, cephalic horn curved and hamate behind. 



Cephalic horn with a basal hook behind, clypeus 

 smooth, intervals of elytra covered with deep, very 

 closely set- punctures (pi. xxxiii., fig. 7) jAiitus. 



Cephalic horn with a sub-median hook behind; 

 clypeus as closely punctured as the rest of the 

 head; intervals of elytra covered with deep, very 

 closely set- punctures mesacanthns. 



Cephalic horn with a sub-median tooth behind; 

 clypeus and head punctured ; prothorax very deeply 

 excavate, and with the sides of the excavation pro- 

 duced in front as two conspicuous horns on each side ; 

 elytra opaque; intervals impunctate (pi. xxxiii., 

 fig. 5) hootcs. 



Cephalic horn short, thick at base, sharply curved ; 

 prothorax deeply excavate, walls of excavation not 

 dentate, truncate at apex, elytra shining .. .. excavatus. 



