48 Trans. Acad. Sct. of St. Louis. 
unknown; female with the sixth ventral narrowed at tip; the latter 
rather strongly, evenly arcuate. Length 8.0 mm.; widthl.4mm. Texas 
(Galveston) ..-ceee cece sccrccrccerecectccreececs -++-atronitens n. sp. 
Form rather slender, feebly fusiform, rather convex, shining, black, the 
prothorax very faintly picescent; legs flavate, the antennae fuscous, flav- 
ate toward tip; head very narrow, parallel and elongate, very much nar- 
rower than the elytra, the sides straight and parallel for a long distance 
behind the eyes, then rapidly rounding to the neck; eyes well devel- 
oped, moderately prominent; punctures rather coarse and close-set 
in basal half, the anterior half almost impunctate; prothorax distinctly 
elongate, as long as the head and slightly wider, the sides parallel and 
evenly, very distinctly arcuate, the punctures moderate in size, unusually 
feebly impressed and not at all conspicuous, sparse; elytra distinctly 
elongate, parallel, only very slightly longer but more distinctly wider 
than the prothorax, the punctures small but strong, close-set and con- 
fused throughout; abdomen as wide as the elytra, gradually tapering 
posteriorly, finely and not very closely punctate, polished. Male un- 
known; female with the sixth ventral asin atronitens. Length 6.5 mm., 
width 1.28mm. Virginia (Norfolk).............+.--«-parviceps 0. sp. 
12 — Body stout, fusiform, moderately convex, polished, black, the elytra 
bright rufous with an elongate parallel sutural spot of black, extending 
from the base to about apical fourth and slightly dilated behind; legs 
pale flavate; antennae black, the two basal joints rufous; head narrow 
and elongate, very much narrower than the elytra, the sides feebly con- 
verging behind the eyes and almost evenly, distinctly arcuate from the 
eyes to the neck, the latter not quite three-fourths as wide as the head; 
eyes moderate in size and prominence; punctures rather small and moder- 
ately close-set, the anterior half subimpunctate; prothorax distinctly 
elongate, only very slightly narrower than the head, the sides parallel 
and feebly arcuate; punctures rather coarse, impressed, sparse; elytra 
large, longer than wide, the sides parallel and feebly arcuate, much 
longer and wider than the prothorax, the punctures small but strong, 
close-set and confused; abdomen distinctly narrower than the elytra, 
finely, not very closely punctate. Male with the fifth ventral not modi- 
fied at apex, the sixth with an acutely triangular notch nearly three- 
fourths as wide as the apex and fully as deep as wide; female with the 
elytra still larger, the abdomen broader and the head not wider than 
the prothorax, the sixth ventral obtusely rounded at tip. Length 
8.4mm.; width 1.55-1.7 mm. Indiana and Illinois......sellatum Lec. 
13 — Form rather stout and convex, shining, black, the elytra rufous with 
the sutural bead sometimes darker especially at base; legs rufous, the 
antennae dusky, rufous at base; head elongate, much narrower than the 
elytra, the eyes rather prominent; punctures moderately coarse, rather 
shallow and extremely sparse; prothorax much elongated, narrower 
than the head, parallel, the sides feebly arcuate, the apex slightly nar- 
rower than the base; punctures moderately coarse, shallow, impressed, 
very sparse, with a more regular series along the smooth median area; 
elytra slightly elongate, parallel, scarcely longer but distinctly wider than 
the prothorax, the sides feebly arcuate; punctures very coarse, im- 
pressed, sparse and only partially serial; abdomen as wide as the elytra 
