370 COLEOPTERA 



and closely punctured ; the elytra are distinctly convex behind the 

 middle, and are consequently more abruptly declivous behind than in 

 C. opaciila ; the base is feebly sinuately truncated, and between it and 

 the base of the prothorax (and the hind angles of the latter, which 

 repose on the shoulders) there is a decided open space, as in C. 

 opacula ; the lateral margins are expanded (but less broadly so than 

 in the preceding species) and concave, and there is the row of rugged 

 fovese just within this margin, as in C. opacula ; the discs of the elytra 

 also present traces of numerous narrow longitudinal costae ; the under- 

 side and legs are of a deep brownish-black, shining ; the antennce, tarsi, 

 and palpi are reddish brown. ** 



Length, yi- lines ; elytra, width 3! lines. 



New Zealand. 



667. O. Otag'ensiS, Bates : Ami. Mag. Nat. Hist., Dec, 1873. 

 Very close to C. opacula, and difficult intelligibly to define in what it 

 differs from that species ; it is, however, distinctly narrower or oblong- 

 oval, usually smaller, paler, more convex, the base of the prothorax more 

 closely applied to the base of the elytra, distinctly more shining, the 

 punctation, &c., on the elytra coarser, more confluent and confused, 

 somewhat ruggedly so at the sides ; the sides of the prothorax more 

 rounded, more incurved at the base, the median basal lobe more promi- 

 nent ; the base, consequently, has not that appearance of being bisinuate- 

 emarginate as is the case in C. opacula. 



Head closely punctured, the punctures coarsest and somewhat con- 

 fluent on the front, between the eyes, where there are also usually two 

 more or less marked foveate depressions ; prothorax more or less 

 strongly transverse ; sides more or less regularly rounded, more narrowed 

 in front than behind, always distinctly , and more or less sinuously 

 incurved before the hind angles ; apex deeply arcuate-emarginate, the 

 angles prominent, sub-acute, and usually directed forwards ; base 

 bisinuate, the angles more or less prominent and acute, reposing on the 

 shoulders of the elytra, and directed backwards ; disc moderately 

 convex, very closely (save on the centre) punctured, the interstices a 

 little elevated, and more or less reticulate, at the sides ; a transverse 

 depression sub-parallel and near to the base, and an angulate fovea at 

 each side, close to the basal margin (as in ^ ? of C opacula) ; sides 

 moderately expanded, the edges unequally (not uniformly) thickened ; 

 scutellum as in C. opacula : elytra oblong-oval, base sinuate-truncated ; 

 disc moderately convex, closely and more or less confluently punctured ; 

 the interstices (especially at the sides) elevated, minutely granulose, 

 reticulately confluent, sometimes assuming the form of irregular nodules, 

 at others of small umbilicated tubercles ; the ordinary series of narrow 

 costae and the row of fovese within the side-margins more or less 

 apparent; sides rather strongly expanded, concave, transversely reticu- 

 lately rugose-punctate and granulous; underside, legs, antennae, &c., as 

 in C. opacula. 



Length, 71—81 Hnes ; width of elytra, 31—4 lines. 



Otago, New Zealand. Four examples. 



