1892.] of the Coleoptera of South Africa. 81 



the posterior angles very acute ; elytra oblong, not much depressed 

 in the male, a little more convex in the female, acuminated behind, 

 with the apical sutural part very spinose in the male, and less so in 

 the female ; they are covered with closely set punctures, and have 

 on each side a short basal ridge, a dorsal one consisting of four 

 oblique disconnected ridges, and a broad, uninterrupted, external, 

 white supra-marginal ridge reaching from the base to the apex. 



Length, 14-16 ; width, b-bY""^' 



Transvaal (Lydenburg, Barberton). 



D. IMMACULATA. Paring. 



Trans. S. Afric. Phil. Soc, vol. IV., 1888, p. 70. 

 pl. 11, fig. 7. 



Brassy, moderately shining, underside dark-blue ; head strigose, 

 labrum (female) black with a median yellowish band ; prothorax 

 irregularly plicated, quadrate, with the protuberances of the disk much 

 raised, and the posterior angles acute ; elytra oblong, convex, closely 

 and deeply punctured, sature divaricating at the apex and obtuse ; they 

 have each a narrow raised lin6 parallel to the suture and nearly reaching 

 the apex, a dorsal one interrupted as it reaches the middle and con- 

 tinued by a shout line, a second discoidal one formed by four discon- 

 nected oblique ridges and an external, continuous supra-marginal one 

 reaching nearly from the shoulder to the apex. 



Length, 18 ; width, 6^"^' ' 



A female example has a very small, almost obsoletej median 

 yellowish dot in the lateral margin. 



Length, 18 ; width, 6'"*"^- 



Cape Colony (Graham's Town). 



Gen. COSMEMA. Bohem. 

 Insecta Cafcarige, 1848, Part. I, p. 19. 

 Body very slender, wingless, oblong, convex, labrum five dentate 



