1904.] Catalogue of the Coleoptera of South Africa. 269' 



the median part, extending across the median part of the disk ; 

 clypeus hexagonal and covered like the head with somewhat hair- 

 like scales springing from the scrobiculate punctures; antennae, 

 palpi, and legs rufescent ; prothorax of the usual shape, plainly 

 grooved for two-thirds of the length, and with the walls of the 

 groove broadly smooth, the basal, elongate denuded patch is very 

 distinct on each side, the hairs on the outer margins and in the base 

 are white, but occasionally navescent ; scutellum impunctate ; elytra 

 cylindrical, non-costulate ; under side and legs as in the other 

 species ; anterior tibiae uni -dentate outwardly ; sixth and seventh 

 joints of antennae aculeate. 



Length 12-13 mm. ; width 5f-6 mm. 



Hob. Natal (Durban, Frere) ; Transvaal (Lydenburg, Pretoria, 

 Potchefstroom, Johannesburg). 



Psilonychus duponti, Burm., 

 Handb. d. Entomol., iv., 2, p. 289. 



Male : A little more robust than P. gracilis, bronze-green, but with 

 the scales on the upper side finer and much more elongated, the 

 pattern on the elytra is quite indistinct ; clypeus plainly hexagonal ; 

 the broad denuded walls of the median groove of the prothorax 

 are very plain, but the supra-lateral, basal, denuded patch is 

 sometimes very indistinct, and the outer margins are strongly 

 serrate ; the scutellum is impunctate ; the elytra are not costulate 

 but the punctures are deep and seriate ; the antennae and palpi are 

 rufescent or piceous, the eighth antennal joint is laminate and 

 reaches to two-thirds of the length of the eighth, the sixth is also 

 laminate but is only one-fifth of the length of the eighth, and the 

 anterior tibiae are uni-dentate. 



Length 13f-14 mm. ; width 6J-7 mm. 



Hah. Natal (Upper Tongaat). 



Psilonychus perturbator, n. spec. 



Male : Shape, colour, and size of P. gracilis, the white scales on 

 the upper side are of the same size and similarly disposed, but it 

 differs in the shape of the clypeus the outer sides of which are not 

 aculeate in the median part, and are thus very much less hexagonal; 

 in the shape of the antennal joints, the seventh of which is laminate 

 and about one-sixth of the length of the eighth, while the sixth is 

 not aculeate ; and also in the tibiae being bi-dentate outwardly ; the 

 median depression of the prothorax is not deep, the two smooth walls 

 are more in the shape of two parallel median patches, and the supra- 



