250 NEW SPECIES OF AUSTRALIAN COLEOPTERA, II., 



Cardiothorax C(ERULE0-niger, n.sp. 



Elongate-ovate, upper surface shining metallic blue-black,, 

 beneath black; antennae and tarsi brown. 



Head with frontal impression deeply marked and having thereon 

 a cluster of fovea?, varying in number from two to six, between 

 the eyes. Antennae stout and long, i.e., extending beyond the 

 base of prothorax when set back. Prothorax convex, apex feebly 

 emarginate, front angles short and obtuse, sides gently rounded 

 anteriorly, more abruptly posteriorly, with regular reflexed border; 

 foliaceous sides narrow, obsolete behind, and bearing two or more 

 setse. Disc smooth, median line strongly impressed throughout; 

 base much narrower than apex, nearly truncate at base and apex; 

 hind angles small but distinct and directed outwards. Scutellum 

 triangular, smooth and on same level as elytra. Elytra not 

 depressed behind scutellum; shoulders narrow, very obliquely 

 rounded; on each elytron are six narrow sulci, which tend to 

 become obsolete towards the sides and apex. Intervals flat and 

 equal. Femora unarmed in both sexes; front tibiae strongly 

 thickened towards apex; intermediate tibise of Q slightly bowed r 

 in ^ straight; hind tibia 1 straight in both sexes. Dimensions 

 13-15 x 4-5 mm. 



Loc. — Buladelah, N.S. W. (brush country inland from Port 

 Stephens; H. J. Carter). 



This species is readily distinguished from all other Cardiothorax 

 by its glossy blue-black colour combined with its smooth pro- 

 thorax* In structure it is somewhat allied to C. ameus Bates T 

 and C. politicollis Bates, but differs from both in its more 

 explanate margin of pronotum. 



In the (J the elytra are about of the same width as the pro- 

 thorax at widest; in the £ the elytra are rather broader than the 

 prothorax. 



* Only the very faintest impressions of any discal fovea, are to be discerned 

 on some specimens, near the base. 



