NORTH AMERICAN COLEOPTERA. 
325 
on each side, apical third vaguely puhescent, enclosing a naked spot on the 
suture; body beneath scarcely more shining than above, spansely puhescent; 
prosternal lobe broadly and deeply eniarginate, intercoxal process rather broad, 
narrowed at tip, pro])leuiffi grannlate-punctate, sparsely pubescent; metasternum 
closely punctate, slightly strigose. Abdomen sparsely ])unctate, slightly strigose 
at the sides of the first two segments, vertical portion of segments scarcely pu- 
hescent ; pygidium coarsely punctate, feebly carinate; claws cleft at middle, 
forming a broad tooth. Length .18 — .22 inch.; 4.5— 5.5 mm. 
Male . — Front ratlier more distinctly impressed. Prosternum 
densely punctured and pubescent. Metasternum concave, densely 
punctured aud pubescent; anterior tibiae distinctly mucronate, mid- 
dle and posterior simple ; first ventral segment slightly fiattened at 
middle. 
Female . — Front less impressed ; in this sex the transverse depression 
is more often seen. Prosternum rather sparsely punctate, not hairy. 
INIetasternum flat, not closely punctate, nor hairy ; ventral segments 
simple; tibiae mucronate. 
Variations . — The color is but little variable, but the pubescence 
may be more or less abraded. The median dorsal depression of the 
thorax may be more or less dee[), but still preserving the form of 
two foveae united by a groove. 
Nothing is known of the habits of this species, although rather 
widely distributed. 
Hab . — Canada to Texas. 
A. n. sp. — Moderately elongate, dark olive bronze, feebly shining, 
elytra with sparsely pubescent areas forming a design. Anteniife piceous, slightly 
bronzed, attaining the middle of the thorax, serrate from the fifth joint; head 
convex, with a faint linear median impression, closely punctate and reticulately 
strigose. Thorax one-fourth wider than long, sides arcuate, slightly sinuate 
near the hind angles, these rectangular, and with a sharp, straight carina, mar- 
gin sinuate, disc moderately convex, with a median broad depression, with a fine 
impressed line at bottom extending three-fourths from base to apex, lateral ob- 
lique depressions well marked, surface transversely and rather closely strigose; 
scutellum transversely carinate; elytra sinuate behind the humeri, then slightly 
broadened, obliquely narrowed to apices, these rounded and serrulate ; disc 
slightly flattened, with a very vague costa each side, basal depressions well 
marked, surface closely imbricate, with the pubescent spaces arranged nearly as 
in Lecontei, but less densely pubescent; body beneath more shining than above 
and with scattered pubescence; prosternal lobe rounded, the intercoxal process 
moderately broad, slightly wider hehind the cox® and truncate at tip, propleurte 
punctate aud strigose; metasternum at sides finely punctate and not closely 
strigose. Abdomen finely punctate aud finely strigose, the vertical portions of 
the segments more evidently puhescent ; pygidium sparsely punctate, not dis- 
tinctly carinate ; claws broadly toothed. Length .18 inch. ; 4.5 mm. 
