1904.] Catalogue of the Coleoptera of South Africa. 31 



the male, but not in the female ; basal joint of hind tarsi much 

 longer than the second ; the double row of bristles lining the inner 

 part of the hind tibiae very long and closely set. 



Evidently allied to Triodonta, but distinguished by the extra- 

 ordinary shape of the anterior tarsi of the male. 



The four South African species included in this genus are so 

 closely allied that their identification is very difficult. 



Key to the Species. 



A 3 . The longer spur of the hind tibiae half the length of the basal 

 tarsal joint. 



Whole body light testaceous sericans. 



Head and abdominal segments fuscous rhodesiana. 



A 2 . Spur of the hind tibiae one-third of the length of the basal tarsal joint. 



Body somewhat elongato-ovate modesta. 



A 1 . Spurs of hind tibiae very short, especially in the male. 



Wholly pale testaceous or fusco-testaceous sebakuana. 



ElJRONYCHA SEEICANS, Fahl\, 



Insect. Caffr., ii., p. 140. 



Very pale testaceous, but the clypeus testaceous, the whole body 

 is covered with a whitish silky appressed pubescence ; clypeus with 

 a faint suture at the junction with the head, diagonally narrowed 

 laterally from the base to the anterior part where it is only half 

 the width of the base, arcuately emarginate in front with the outer 

 angles moderately sharp, eyes large, canthus not deep ; prothorax 

 moderately convex, deeply punctured, the punctures equi-distant and 

 bearing each a silky appressed hair ; scutellum sharply ogival, 

 deeply punctate ; elytra very little ampliated laterally, slightly 

 convex in the posterior part and rounded at apex, plainly striate 

 although the striae are not deep, intervals plane, closely punctured ; 

 anterior tarsi of the male short, joints triangular dilated outwardly, 

 and increasing in width from the basal to the ante-penultimate one 

 and wider than long, last one as long as the three preceding taken 

 together, claws moderately divaricating, laminato-lobate underneath 

 for half the length, and produced thence into a fine hook ; inter- 

 mediate and posterior ones deeply cleft, the upper tooth longer and 

 more slender than the lower ; anterior tibiae tri-dentate ; abdomen 

 very compressed laterally ; pygidium triangular, slightly convex ; the 



