288 MEMOIRS ON THE COLEOPTERA 



shorter than the body, or ( 9 ) but slightly more than half as 

 long as the body; prothorax (cf) not quite so transverse and always 

 somewhat narrower than the elytra, sculptured as in antennatum 

 throughout, except that the densely punctured lateral areas are 

 less opaque, the punctures being less minute; scutellum more 

 shining and less obtuse; elytra differing radically in being more 

 coarsely and deeply punctured, much more shining, with the 

 punctures very distinctly defined and coarser apically, the fine 

 raised lines obsolescent; prosternal sculpture (cf) similar but 

 rather less minute, or ( 9 ) smooth, shining and very finely, feebly 

 and remotely sculptured. Length 12.0-14.0 mm.; width 4.0-4.8 



mm. California, Nevada and Idaho hesperum n. subsp. 



3 Size larger, oblong, somewhat shining, obscure deep blue, the elytra 

 feebly violaceous, the antennae slender; prothorax (cf ) finely, very 

 densely punctate and subopaque laterally and anteriorly, the median 

 parts basally coarsely, deeply and closely so but shining, with a more 

 shining and less closely sculptured spot at each side of the middle, 

 or ( 9 ) fully as large, similarly rounded at the sides but even more 

 constricted and very broadly subtubulate at base, shining but with 

 very coarse, dense and subconfluent punctures throughout, except 

 a small smooth shining spot at the middle of the length near lateral 

 fourth; elytra scarcely twice as long as wide, parallel, with perfectly 

 straight sides to the very broadly rounded apices, much wider than 

 the prothorax in both sexes, very coarsely, strongly and closely 

 punctured throughout but shining, each puncture with a small hair 

 growing from an acute granule at its anterior margin; prosternum 

 (c?) finely, closely but deeply, rugulosely punctate and dull, or ( 9 ) 

 strongly shining and coarsely, deeply, very confluently and trans- 

 versely punctato-rugose. Length 9.0-13.3 mm.; width 3.2-5.0 mm. 

 New York (Lake George). [ C. janthinum Lee., Journ. Acad. 



Phila., ser. 2, II, p. 34] janthinum Lee. 



Size smaller, more convex, shining almost throughout 4 



4 Form elongate, very dark greenish-blue and strongly shining above, 

 except at the sides of the prothorax, where the sculpture becomes 

 abruptly very coarsely and opaquely punctato-rugose, the rugose 

 area separated from the simply coarsely and deeply and rather 

 closely punctate median part by a line that curves gently from the 

 anterior margin near the sides to the sides before the base, without 

 trace of sinus; under surface, legs and antennae shining and deep 

 black; pubescence erect, black and bristling from the head and pro- 

 thorax laterally, almost wanting and extremely short on the elytra; 

 head densely punctate, small, the antennas (cf) about two-thirds 

 as long as the body, rather thickened basally but with the basal 

 joint not abnormally thickened; prothorax two-thirds wider than 

 long, parallel, quite evenly and strongly rounded at the sides through- 

 out, not at all constricted or subtubulate at base; scutellum small, 

 nude, very obtusely and broadly ogival; elytra scarcely twice as 

 long as wide, very feebly narrowed from base to the obtuse apices, 

 at base distinctly wider than the prothorax, very coarsely, deeply 

 and densely punctate throughout, the punctures irregularly and 



