1892.] of the GoUoptera of South Africa. 91 



increasing in width from the middle towards the apex, and with a very 

 slight inward spur about the third part of the length. 



Length, 10^ ; width, 5"^'™- 



Allied to G. marginella, but larger ; the punctuation of the elytra is 

 broader and deeper, and the kteral white band is much broader. This 

 species, which I have seen in De Chaudoir's collection, under the 

 manuscript name of G. aspera, is evidently a form of transition between 

 marginella and coarctata. 



Bechuanaland, Lake N'G-ami (teste Boheman), Cape Colony 

 (Kimberley). 



0. COARCTATA. Dej. 



Spec. IT, p. 435. Iconogr. 1, p. 37, t. 1, f. 5. 



Brassy, shining on the upper part, underside bright bluish-black, 

 with the antennae and tibiae rufescent : head strigose, labrum yellow 

 and very narrowly edged with black in both sexes ; prothorax finely 

 plicated, sub-cylindrical with the sides of the disk very little raised ; 

 elytra finely shagreened, convex, with the suture produced in two 

 sharp spines, moderately long in the male, short in the female ; they 

 have on each side, above the outer margin a yellowish band reaching 

 from the shoulder to the apex and emitting a short spur, directed 

 inwardly, at about two-thirds of the length of the elytra ; this 

 marginal band from the spur to the apex is broader in the female. 



Length, 12-13 ; width, 3J-4J^^-"^- 



Cape Colony (Port Elizabeth, Bathurst, Grraham's Town, Sunday 

 River). 



C. VITTATA. Dej., 



Spec, v., p. 269. 



Brassy shining on the upper part, underside and legs bright bluish- 

 black ; head strigose, labrum narrowly edged with black in the 



