NOKTH AMERICAN COLEOPTEKA. 
317 
very little wider than lon.s, arcuate in front, slightly sinuate in front of the 
hind angles, which are acutely rectangular and with a sharply defined straight 
Carina, margin feehly sinuate; disc convex, with a vague median depression pos- 
tei'iorly, lateral ohliqne depressions moderate, surface transversely strigose with 
fine, distant imnctnres between ; scuteilum transversely carinate ; elytra slightly 
sinuate behind the humeri, feehly dilated behind the middle, ajiices rounded 
and serrulate, disc slightly flattened with a very vague costa, basal depression 
feeble, surface imbricate, on each elytron three round pubescent spots, basal, 
ante-median and one-third from apex; body beneath more hi'assy tlian above; 
prosternal lobe entire or snhtruncate, intercoxal process gradually narrowed, 
acute at apex, itroplenrpe scabrous in sculpture, sparsely pube.scent; metasternum 
subgranulate and transver.sely strigose. Abdomen sparsely pui}ctate at middle 
and alutaceous, at sides somewhat strigose. vertical portion of the segments 
sparsely pubescent; jiygidium coarsely punctate, carinate at middle anteriorly; 
claws dissimilar. Length .16 — .24 inch.; 4 — 6 mm. 
Male. — Head Hatter, more oitaque and more granulate, usually 
green ; prosternum densely punctate and with rather long pubes- 
cence ; metasternum Hat, densely punctured ; first two ventral seg- 
ments longitudinally impressed at middle, their entire length, sparsely 
pubescent ; claws of anterior tarsi cleft very near the apex, nearly 
bifid, middle and posterior claws cleft at middle, forming a broad 
tooth ; anterior and middle tibire slightly mucronate. 
Female. — Head cujireous or bras.sy, less distinctly sculptured, more 
convex ; prosternum sparsely punctate, not hairy ; metasternum 
slightly convex, simply {)unctate ; first two ventral segments convex 
at middle ; claws cleft at middle, forming a broad tooth ; tibife not 
mucronate. 
Variations. — Slight variations in color will be seen as usual in the 
dark species. The median impression of the thorax may consist of 
an anterior fovea or a feebly impressed median line. 
When the pubescent spots are removed by abrasion, this species, 
especially the smaller specimens, greatly resembles egenus, and great 
care must be used in separating them, but the serration of the an- 
tennae is quite different in the two species. 
Of its habits I know nothing. 
Hab. — Canada southward to Louisiana and Texas, westward to 
Nebraska. 
A. obsoletOgiittRtiiS Gory. — Form slender, elongate, color brassy black 
or dark olivaceous, feebly shining, each elytron with three pubescent spaces, the 
middle one elongate. Antennae slender, passing the middle of the thorax, more 
or less aeneous, serrate from the fourth joint; head coarsely punctate, occiput 
strigose. front flat, with a depression at its upper part in chevron. Thorax very 
little wider than long, slightly narrowed at base, sides feebly arcuate, slightly 
sinuate near the hind angles, which are sharply rectangular and with a well 
