Memoirs on the coleoptera

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 transversely
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 prothorax
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 throughout,
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