1907.] Catalogue of the Coleoptera of South Africa. 433 



sharply triangular and grooved laterally ; elytra plainly sinuate 

 laterally, and with two distinct dorsal costae on each side ; sternal 

 process sub-transversely aculeate, projecting beyond the coxae ; 

 anterior tibiae dentate outwardly at the apex only and only very 

 slightly sinuate above it ; intermediate tibiae without tooth or spine 

 on the upper side, posterior ones with only a rudimentary one ; the 

 basal joint of the hind tarsi is moderately angular outwardly, and 

 the anterior claws are long and broadly divaricating. 



This genus is founded for the reception of Trichostetha placida, 

 Boh., which differs greatly from Trichostetha, not only in the 

 toothed maxillae, but in the absence of the two teeth on the upper 

 side of the intermediate tibiae, the uni-dentate anterior ones, the 

 position of the two dorsal costae on the elytra, &c. 



Atrichia placida, Bohem., 



Plate XLIII, fig. 14. 

 Insect. Caffr., ii., 1857, p. 20. 



Var. algoensis, Pering., Trans. S. Afric. Phil. Soc, hi., 1885, p. 90. 



Var. bugnioni, Sch., loc. cit., p. 400. 



Type. Black, glabrous on the upper side ; the prothorax and 

 elytra light sienna-brown; the head is closely punctate, and the 

 frontal part very densely pubescent, the pubescence is greyish ; the 

 prothorax, very narrowed in front, has two broad fuscous dorsal 

 bands gradually narrowing in width from base to apex, and is very 

 deeply and closely punctate except in the median dorsal part 

 between the two fuscous bands ; the scutellum has a few remote, 

 dot-like punctures ; the elytra are closely and somewhat broadly 

 punctate, but the punctures are very shallow, the sutural part from 

 the sides of the scutellum to the apex is fuscous black, and on each 

 side there is a round, or quadrate black macule at about three-fourths 

 of the length on the deflexed part, the posterior callus is infuscate ; 

 pygidium glabrous, and with four or six white macules ; abdominal 

 segments somewhat pubescent along the sides and having on each a 

 short white macule-like band , pectus clothed with a light fulvous 

 pubescence ; hind legs densely pubescent inwardly. 



Var. algoensis. A little more elongated than the type, and, as a 

 rule, opaque on the upper side ; the prothorax is either totally black 

 or the two dorsal black bands have invaded the greatest part of the 

 disk, and the elytra are irregularly suffused with black on the dorsal 

 part, or are, as in the type ; the abdominal segments have two rows 

 of white macules, and the metasternum three or four ; in most cases 

 there is a white dot at the base of the tibiae. 



28 



