238 Trans. Acad. Sci. of St. Louis. 
the punctures of the elytra relatively very coarse and rugose, those of 
the abdomen rather fine, black throughout, the prothorax sometimes 
obscurely rufescent, the elytra pale in apical fourth, the pale area not 
extending anteriorly along the suture except very slightly; head some- 
what wider than the elytra; eyes convex, prominent, at about their 
own length from the base; prothorax but slightly elongate, very little 
narrower than the head, the sides rather strongly rounded behind 
apical fourth, thence unusually convergent and nearly straight to the 
broadly obtuse but distinct basal angles; elytra elongate, gradually 
narrowed toward tip, just visibly wider and oualy very slightly longer 
than the prothorax; abdomen gradually broader posteriorly. Male 
with the deep and acutely angulate incisure of the sixth ventral deeper 
than wide, moderate in size, with coarsely beaded sides and with the 
opening scarcely a third as wideas the segmental apex. Length3.7mm.; 
width 0.52 mm. Rhode Island (Boston Neck).......--spectrum n. sp. 
Body very slender and parallel, pale ochreo-testaceous in color, the head, 
a spot on each elytron somewhat variable in size but situated at the 
external margin behind the middle, and last two ventrals, black, in the 
last case extending anteriorly onto the fourth segment as a rule; head 
elongate, well developed, much wider than the elytra, the eyes moder- 
ately convex and at their own length from the base; prothorax much 
narrower than the head, slightly elongate, broadly rounded at the sides 
anteriorly and only moderately narrowed thence to the base; elytra 
elongate, but little narrowed posteriorly, just visibly wider and only 
slightly longer than the prothorax; abdomen slender, gradually broader 
behind. Male with the angulate notch of the sixth ventral moderate in 
size, more broadly triangular than usual, with the side margins widely 
beveled, the opening nearly one-half the segmental width and some- 
what wider than the depth. Length 3.8-3.7 mm.; width 0.5 mm. 
TOWB. cccccccccccccccccvcrccccescescccvovcescovesccccce MnOtatus Say 
10 — Prothorax unusually small, much narrower than the head. Body 
moderately slender, black or piceous-black throughout, the elytra pale 
in apical two-fifths at the sides and half at the suture, the legs and 
antennae pale flavo-testaceous; head large and well developed, a 
little longer than wide, abruptly narrowed before the rather small 
but strongly convex eyes, this part only about four-fifths as wide as 
the part behind the eyes, the base broadly arcuato-truncate; pro- 
thorax very small, elongate, three-fourths as wide as the head, the 
sides broadly rounded anteriorly and thence unusually convergent to 
the base; elytra large, but little longer than wide, not evidently nar- 
rowed posteriorly, wider than the head, two-fifths wider and a third 
longer than the prothorax; abdomen much narrower than the elytra 
but wider than the prothorax, parallel, not distinctly wider posteriorly, 
rather coarsely asperate. Male with the notch of the sixth ventral 
rather large, much deeper than wide, somewhat parabolic in outline, 
the angle very narrowly rounded, the edges strongly beaded, the pos- 
terior angles slightly obtuse but scarcely rounded, the opening nearly 
a third as wide as the segmental apex. Length 3.3-3.7 mm.; width 
0.65 mm. New York to Lowa... ccccce veveccccccccccses Cinctus Say 
Prothorax well developed, only slightly smaller than the head.......«..1l 
