NORTH AMERICAN COLEOPTERA. 
315 
the clypeus. densely and rather roughly punctate, sparsely pubescent. Thorax 
very little wider than long, sides feebly arcuate, margin sinuate, hind angles 
rectangular, with a distinct, nearly straight carina, disc convex, without median 
dorsal imjiression, lateral depression feeble, surface rather roughly granulately 
sculptured: scutellum rather uneven, but without distinct transverse carina: 
elytra slightly sinuate behind the humeri, then nearly parallel, gradually nar- 
rowed at apical third, apices rounded, indistinctly serrulate, disc slightly flat- 
tened with a vague costa each side, between which and the suture the surface, is 
somewhat concave, basal depressions very feeble, surface rather densely granu- 
late, more finely in the dorsal groove, surface sparsely clothed with short, fine 
pubescence, apparently closer in the groove, giving an appearance of a vitta; 
body beneath more brassy than above; prosternal lobe rounded, intercoxal pro- 
cess broad, with its apex squarely truncate, i)ropleurfe densely granulate-punctate ; 
metasternum at sides closely punctate. Abdomen ratber coarsely and moder- 
ately closely punctate, very little more densely at the sides, surface sjjarsely 
pubescent, vertical portion of the segments s[iarsely pubescent; last segment 
finely serrulate at the sides near apex; pygidium coarsely punctate, feebly cari- 
nate; claws dissimilar in the sexes. Length .24 — .28 inch.; 6 — 7 mm. 
Male . — Prosternum densely punctate and with silken hair, which 
extends along the middle of the metasternum ; first two ventral seg- 
ments slightly flattened, a little more pubescent along the middle ; 
claws cleft close to the apex, almost bifid. 
Female . — Prosternum less densely jiunctate and less hairv ; ventral 
segments convex at middle ; claws cleft at middle, forming an acute 
tooth. 
No variations have been observed. 
The structural characters of this species will enable it to be readily 
))laced among those with more or less serrulate last ventral segment, 
non-carinate scutellum, elytra! apex nearly without serrulation and 
hind angles of thorax but feebly carinate. 
Hab . — San Diego, Cal. 
.4. polituft Say. — Moderately elongate, slightly depre.ssed on the dorsum, 
color variable from rather bright brassy to cupreous, purplish, plumbeous, bluish 
or greenish, moderately shining. Antennse rather short, not reaching the mid- 
dle of the thorax, variable in color, serrate from the fourth joint; head slightly 
convex, a feeble median depression from the occiput to the middle of the front; 
front coarsely granulate, occiput strigo.se. Thorax one-third wader than long, 
sides slightly arcuate, margin feebly .sinuate, hind angles feebly carinate in both 
sexes, disc convex with two feeble median depressions, one near base and one 
STiialler near apex, lateral oblique depression feeble, surface rather coaivsely 
transversely strigose, punctate between the strigte ; scutellum transversely cari- 
nate ; elytra sinuate behind the humeri, dilated behind the middle, more notably 
in the female, slightly sinuate near the apices, which are rounded and serrulate; 
disc slightly flattened, sometimes with a very vague costa in the male, basal de- 
jn-essions feeble, surface closely iinbricate-granulate ; body beneath more shinitig 
than above; prosternal lobe truncate, or vaguely einarginate, intercoxal process 
