474 Transactions South African Plulosophical Society, [vol. xii. 



four ciliate outer teeth; apical spurs moderately long, slender, of 

 equal length in the posterior legs but unequal in the intermediate ; 

 tarsi long, slender, claw also slender. 



Although having nine-jointed antenme like the Apliodiina this 

 genus, owing to the great development of the mandibles and of 

 the labrum, the shape of the body and also of the pygidium, must 

 be separated from them and form a tribe of its own. 



The insects included in this genus are not found in dung like most 

 of the Aphodiince, but in sandy places under stones or debris, generally 

 near the banks of pools or vleis. C. 'imncticollis throws back, when 

 seized, its prothorax to a great angle with the elytra, very much 

 like some carabid beetles of the genus Scarites found in the same 

 localities, especially S. rugiceps, which it greatly resembles, although 

 it is much smaller. 



In the male the horizontal or sub-horizontal pygidium is more 

 convex than in the female, and^&i the anterior part of the head there 

 are two or more tubercles ; in C. imncticollis the sheaths of the penis 

 are symmetrical (plate xxxviii., fig 35). 



The genus is represented in India, Java, Senegal, and Somali- 

 land. 



Key to the Species. 



Prothorax covered with deep, moderately closely set punctures 

 less numerous in the centre than on the sides ; anterior part of the 

 head with two tubercles in the male imncticolli 



Prothorax covered all over with very fine and very closely set 

 punctures ; anterior part of the head with three tubercles in the 

 "^^1^ gravis. 



Chiron puncticollis, Har., 

 Berl. Entom. Zeitschr., 1862, p. 402. 

 Piceous black, with the elytra often chestnut-brown ; antennte 

 reddish brown, with the club ashy grey ; head deeply and somewhat 

 rugosely punctured and having a clypeal arcuate impression in front 

 of which are two round impressions bearing a strong seta and sur- 

 mounted by two distinct tubercles in the male, while in the female 

 the impressions and the tubercles are indistinct, labrum deeply 

 incised and tri-dentate on each side of the incision ; prothorax nearly 

 straight laterally but slightly narrower at the l^ase than at apex 

 where the angles are very sharp, whereas they are rounded at the 

 base, it is marginate all round, not very convex, and covered with 

 not closely set punctures which are a little less abundant in the 



