BY THOMAS G. SLOAN B. 345 



mastersi-subgromp, though I consider they would always be found 

 in fresh specimens. The elytra in the female have invariably a 

 nitid, or subnitid round dark discal spot on the basal half of each 

 elytron; in C. semicincta and C. mastersi these nitid spots are 

 very inconspicuous, though their presence can be detected. The 

 species of this group have the labrum normally 3-dentate, the 

 median tooth more strongly developed in the male than in the 

 female; also four widely placed submarginal setse, except in 

 C. discreta var. froggatti, which has the lateral setse as in the 

 other species, but in the middle a transverse row of six setigerous 

 punctures (probably the number of these intermediate punctures 

 is not constant). 



Table of Species. 



Head setose beneath eyes. Pronotum subrugose, lateral sette readily 

 discernible. 



Elytra without whitish discal *spots C. semicincta Brulle. 



Each elytron with a whitish discal spot on posterior t C. discreta Schauin, 



half \ var. froggatti Macl. 



Head glabrous, including sides beneath eyes. Pronotum rugose, lateral 

 setffi small and inconspicuous. 

 Prothorax subparallel (hardly rounded) on sides. Labrum with a large 

 infuscate apical area; in $ with median tooth long, very prominent, 



the tooth on each side obsolescent C. plebeia SI. 



Prothorax rounded on sides. Labrum with edge only infuscate, the tooth 

 on each side of the median one triangular. 

 Elytra without lateral pale marks, except a small median fascia. Upper 



surface of a dark copper colour C. catoptriola Horn. 



Elytra with lateral pale marks, including a humeral lunule, median 

 fascia, and apical lunule. Upper surface of a greenish or bronzy 

 colour C. viastersi Cast. 



Semicincta-Subgroup. 



C. semicincta Brulle. 



Following Fauvel in his " Faune Analytique des Coleopteres 

 de la Nouvelle Caledonie " (1903), I have, in my description of 

 G. plebeia, referred to C. semicincta Brulle, under the name of 

 C. interrupta Fabr. It appears, however, from Fleutiaux's 

 " Catalogue " and Horn's " Index," that the name C. interrupta 



