OF NEW ZEALAND. 369 



expanded margin, not extending to the apex : underside brownish-black, 

 shining, finely punctured ; flanks of prothorax more or less strongly 

 (especially basally) longitudinally rugose, the underside of the expanded 

 lateral margins being transversely rugose : legs dark brown, shining ;- 

 femora finely and not closely punctured; tibia closely submuricately 

 punctured, the anterior obliquely truncated at the outer side at apex ; 

 hind tibiae quite straight ; tarsi and antenna reddish-brown ; joint eight 

 of the latter subpyriform, nine and ten a little transverse, subturbinate, 

 eleven large, broadly rounded at apex. 



Length, 8^-9 lines ; width of elytra, 4j-4f lines. 



New Zealand. 



There is a very great amount of individual variation in the species of 

 this genus in the form of the prothorax (especially) and elytra, and in the 

 amount and intensity of the punctation, &c., of their surface. 



In one of the three examples of the present species before me 

 (possibly a female, as similar differences exist in individuals of the other 

 species whereof a series has been obtained), the form is more expanded 

 or more broadly oval, the head and prothorax are broader in proportion 

 to their length, the sides of the latter, instead of gradually narrowing in 

 a slight curve from base to apex, are sub-parallel to a little beyond the 

 middle, thence rapidly curvedly narrowed to the apex ; besides the two 

 ordinary foveae at each side of the middle, at the basal margin, there is 

 also a broad transverse line or depression, feebly arched, sub-parallel and 

 near to the basal margin; the elytra are broader and less narrowed 

 behind, and the base is squarely truncated ; and the punctation on the 

 prothorax and elytra (especially on their discs) is more open. 



Altogether the largest, most expanded and opaque, and least convex 

 form in the genus. 



666. C. nitidula, Bates; Ann. Mag. Nat. Hist., Dec., 1873. 

 Very near the preceding, and of the same form, but smaller ; the colour 

 black ; the entire upper surface much smoother, and shining; the punc- 

 tation finer and more open, the interstices less distinctly elevated and 

 reticulate ; the elytra do not present the shagreened appearance seen in 

 the preceding ; they are more, and very distinctly convex behind the 

 middle, and consequently more abruptly declivous behind ; on the un- 

 derside the punctation and the rugosities on the flanks of the prothorax 

 and on the abdomen are similar but stronger ; the hind tibiae are feebly 

 but perceptibly sinuous ; antennae, &c., as in C. opacula. 



In the single example of this species before me, the head is distinctly 

 impressed on the crown; \heprothorax is gradually and slightly curvedly 

 narrowed from base to apex ; the apex is strongly arcuately (and feebly 

 sinuously) emarginate, the front angles prominent, subacute, and 

 directed forwards ; the base is strongly bisinuate, the hind angles pro- 

 minent, acute, and slightly outwardly directed ; the lateral margins are 

 expanded (but less broadly so than in the preceding) and slightly 

 reflexed or concave, the edges irregularly thickened, and the base and 

 apex margined at each side only. There is a large distinct outwardly 

 curved impression at each side the disc, extending from near the middle 

 to the basal margin ; the scutellum is transversely curvilinearly triangular 



Y ii 



