86 Trans. Acad. Sci. of St. Louis. 
distance to the base, then broadly rounded to the neck; prothorax 
slightly elongate, wider than the head, the sides parallel and scarcely 
arcuate; elytra scarcely as long as wide, distinctly wider than the pro- 
thorax at base and apex; abdomen as wide as the elytra. Male un- 
known; female with the sixth ventral strongly and rather narrowly 
lobed at tip, the lobe evenly and strongly rounded at apex, with its sur- 
face rather strongly convex and not at allimpressed. Length 7.0 mm.; 
width 1.1mm. British Columbia..........0+2+ see. -Vancouveri 0. sp. 
Body smaller, parallel, moderately stout, shining, piceous-black in color, 
the legs and antennae pale rufous, sculptured nearly as in vancouveri, 
the punctures anteriorly fully as small and still sparser, those of the 
abdomen even denser; head notably elongate and oval, the sides par- 
allel and broadly arcuate, rounding more strongly at base to the neck; 
prothorax distinctly wider than the head, oblong, parallel, slightly 
elongate; elytra distinctly longer than wide, a little wider.than the pro- 
thorax throughout and only very slightly shorter; abdomen parallel, as 
wide as the elytra. Male unknown; female with the sixth ventral 
nearly as in vancouveri. Length 5.7 mm.; width 0.9 mm. _ TIilinois. 
illini n. sp. 
14 — Species of the simile type, parallel or subparallel, rather large in size, 
the antennae moderate in length and frequently stout, the elytral 
punctures more or less fine, sparse and inconspicuous, the male ventral 
characters conspicuous, the fifth and sixth segments more or less 
strongly impressed, the latter also with a large distinct apical emargi- 
MAUOD 6s). bck ben SR DON ed abe OUSAMS CERES EN DOVE NERO ET ANAS NER TORE. 00015 
Species of the simplex type, parallel, the antennae but little less stout and 
rather more elongate than in the preceding, rather large; ventral charac- 
ters of the male inconspicuous, consisting of a very minute nick at the . 
. middle of the apex of the truncate sixth segment and generally a very 
fine linear impression of the disk; elytral punctures generally coarse, 
strong and conspicuous, the legs relatively more slender than usual..20 
15 — Elytraas long as the prothorax......cccccrcee cocceccscsrcevcvcseeel® 
Elytra always shorter than the prothorax in both sexes... ...+ eee seees --17 
16 — Form stout, black, the elytra slightly piceous, the legs and antennae 
dusky testaceous, shining; head small, the sides parallel and straight 
or very feebly arcuate for a long distance behind the eyes, the angles 
broadly rounded; punctures not very coarse and extremely sparse, a 
little less so at the sides; antennae thick, the médial joints strongly 
obconic and less than one-half longer than wide; neck a little more 
than half as wide as the head; gular sutures widely separated, almost 
straight and parallel; prothorax large, but little longer than wide, dis- 
tinctly wider than the head and correspondingly narrower than the 
elytra, gradually feebly narrowed behind from apex to base; punctures 
sparse, very much coarser than those of the head; elytra exactly quad - 
rate, parallel, equal in length to the prothorax, finely, sparsely and in- 
conspicuously punctate; abdomen not quite as wide as the elytra, 
minutely and very densely punctulate, dull in lustre. Male unknown; 
female with the sixth ventral very broadly, obtusely lobed at apex, the 
surface strongly convex, wholly unimpressed. Length 7.0 mm.; width 
1.2mm. Massachusetts, — Mr. Blanchard—and Canada. 
obtusum n. sp. (Fvl. MS.) 
