140 Trans. Acad. Sci. of St. Louis. 
two-fifths longer than the prothorax; abdomen narrower, more densely 
punctulate and dull, distinctly narrower than the elytra. Male with 
the fifth ventral wholly unmodified, the sixth elongate-ogival in form, 
the very narrow apex with a minute and circularly rounded, very abruptly 
formed emargination, a third wider than deep, the lobes of the apex 
acute and not rounded, the surface adjacent with an ill-defined but dis- 
tinct impression along the median line, strongest at apex and disappear- 
ing at two-fifthsfrom the base; female nearly asin fragilis. Length 
4.0 mm.; width 0.68 mm. Pennsylvania, Indiana and Mississippi 
(VickSDUrg) ...-cescccensece seccseccsoeseceee FUDIAA D. Sp. (Fvl. MS.) 
12 — Head slightly wider than the prothorax. Body very slender, the head 
and prothorax piceous-black, the elytra testaceous, witha piceous 
scutellar cloud; abdomen blackish, rufescent at tip, the legs and 
antennae pale; head well developed, sparsely, rather coarsely punctate, 
parallel at the sides, the angles rather broadly rounded; eyes very small, 
at two and one-half times their length from the base; antennae moderate, 
slightly incrassate, the medial joints scarcely one-half longer than wide; 
prothorax narrow and notably elongate, the sides just visibly con- 
verging throughout and straight, the punctures sparse but rather coarse, 
very close-set in a single impressed series at each side of the medial 
smooth area; elytra narrow and elongate, the sides straight, only just 
visibly diverging, the punctures fine, sparse, arranged in unimpressed 
series; abdomen not quite parallel, at base distinctly narrower than 
the elytra, but, posteriorly, fully as wide as the latter, finely but not very 
densely punctulate and feebly shining. Male with the fifth ventral 
wholly unmodified, the sixth broadly obtuse at tip, with a parabolic 
and gradually formed sinus, a third as wide as the apex, twice as wide as 
deep and symmetric, the adjoining surface narrowly and feebly im- 
pressed along the middle for a short distance; female unknown. 
Length 4.7 mm.; width 0.68 mm. lIowa.............-famelica 0. sp. 
Head more or less distinctly narrower than the prothorax...e..e.eeeeeseel8 
13 — Form slender, subparallel, slightly depressed, pale testaceous through- 
out, the elytra sometimes clouded with piceous toward, but not attaining, 
the suture; head and abdomen piceous or black, the latter rufescent 
toward tip; head parallel at the sides, very sparsely punctate, the basal 
angles not broadly rounded; eyes at very slightly less than twice their 
own length from the base; antennae rather thick, extending nearly to 
the middle of the elytra, feebly incrassate, the medial joints barely 
one-half longer than wide; neck distinctly more than half as wide as 
the head; prothorax elongate, narrow, parallel, the sides straight, 
punctured as in rubida; elytra elongate, the sides feebly diverging and 
straight, two-fifths wider and fully a third longer than the prothorax, 
the punctures moderate, impressed, rather close-set in scarcely im- 
pressed series; abdomen narrower than the elytra, subequal thereto 
posteriorly, densely punctulate and dull. Male with the sixth ventral 
nearly as in rubida, the apex slightly more obtuse, the notch a little 
larger and twice as wide as deep and the impression of the surface 
broader, feebler and less defined. Length 4.2 mm.; width 0.7 mm. 
Towa and Lake Superior.....esecevccccccccccececscocssssambigua Lec. 
Form slender, parallel, nearly similar to the preceding but more convex, 
