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



or less distinct, but representing the strige ; propygidium without any 

 trace of stridulating organs, and occasionally densely pubescent like 

 the pygidium which is declivous in both sexes and very little convex ; 

 abdominal segments contracted, metasternum large, grooved longi- 

 tudinally, intercoxal process horizontal, sharply carinate in the 

 inferior margin and fiat at tip ; anterior tibiae strongly tri-dentate 

 outwardly, joints of anterior tarsi moderately thickened, penultimate 

 one not produced into a spine beneath, last one swollen, a little longer 

 than the penultimate one, inner claw massive, bent under the joint, 

 slightly emarginate near the apex, or split into two slender divari- 

 cating teeth connate at base in one species (P. coryclon) ; onychium 

 very short, bi-setose ; basal joint of posterior tarsi angular but not 

 spinose. 



The habits of one of the species are known. It lives in the 

 deposits of faeces heaped outside its nest by an underground Termes. 



Key to the Species. 

 A^. Inner claw of anterior tarsi of male cleft in two long claws. 



Body somewhat depressed and elongate ; genae fairly broad, 

 oblique in front and laterally, not projecting much beyond the 

 eye ; posterior margin of prothoracic excavation bi- or quadri- 

 dentate in the male coryclon. 



A^. Inner claw of anterior tarsi of male simple. 



Body somewhat convex ; genae moderately broad, straight in 

 front, sub-truncate laterally and projecting much beyond the 

 eye ; posterior margin of prothoracic excavation bi-dentate . . corpulenta. 



Body moderately convex ; genae narrow, slightly oblique in front, 

 produced laterally into a triangular tooth carinate on the upper 

 part and projecting much beyond the eye ; prothoracic excava- 

 tion not dentate behind cUversa. 



Body short ; genae very narrow and forming a straight transverse 

 lobe projecting much beyond the eye and strongly reflexed at 

 tip ; prothoracic cavity semicircular, not dentate behind . . mashuna. 



Pycnoschema corpulenta, n. spec, 

 Plate XL., fig. 23. 



Male : Eeddish brown on the head and prothorax ; antennas, 

 elytra, legs, and under side chestnut-brown ; clypeus lanceolate, re- 

 curved at apex, carinate above, the ridge connected with the base of 

 a moderately long horn recurved, almost hooked at tip ; head quite 

 truncate laterally and with the genae produced into a transverse process 



