NORTH AMERICAN COLEOPTERA. 173 



base arcuate, disc convex, very coarsely and closely punctate, surface irregular 

 and with two distinct callosities slightly in front of middle. Elytra wider at 

 base than the thorax, rather broadly eniarginate at middle, humeri obtusely 

 prominent, umbone moderately prominent, disc convex, with a faint oblique im- 

 pression from the humerus to suture, ending in a more or less defined fovea on 

 the first and second striaj, a little in front of middle, the stripe composed of very 

 coarse and deep punctures, closely placed, the intervals not wider than the dis- 

 tance between the punctures very minutely puuctulate, the surface not densely 

 clothed with fine recumbent pubescence, usually intermixed with brown and 

 gray, the scutellum whitish, the two fovese and often two others more posterior 

 black. Body beneath similar in color to the upper surface, shining; the abdomen 

 very sparsely punctate. Legs usually a little paler than the under surface. 

 Length .07 — .16 inch ; 2 — 4 mm. 



In the male the last ventral segment is truncate, shorter than in 

 the female and more convex. 



This species is probably more variable than any other Halticide in 

 our fauna. The size is noted above, and when the small one is pale 

 rufo testaceous and the large one almost black, the contrast is very 

 striking. With the color of the surface the pubescence varies so 

 that the black forms from the Southern States have entirely black 

 pubescence, those from the Middle States with brown color are varie- 

 gated. In the very small specimens the thoracic callosities are not 

 evident, and there seems to be vague median impression. The ob- 

 lique impression of the disc of the elytra may be distinct or not, and 

 the ])unctures round or moie crowded and quadrate. 



The sufficiently abundant material before me proves the necessity 

 of uniting some of the forms mentioned by Crotch under one name. 

 The species since described by LeConte does not belong to the group. 



Occurs from the Hudson's Bay region to Florida, and from Massa- 

 chusetts to Oregon, a sufficiently wide distribution to admit of great 

 climatic variation. 



H. flellyi Or. — Elongate, moderately convex, pale brown, feebly shining 

 sparsely clothed with grayish pubescence and with sparse erect hairs. Antennae 

 brownish, joints 3 4-5 paler. Head pale brown, front testaceous, occiput closely 

 punctate. Thorax as long as wide, quadrate, anterior angles obliquely truncate, 

 sides slightly coarctate behind the middle, disc moderately convex, a vague 

 transverse depression in front of base, surface densely, but not roughly punctate. 

 Elytra nearly twice as wide at base as the base of the thorax, the disc with 

 rather broad, but not deep striae, the punctures rather coarse and closely placed, 

 intervals distinctly convex and finely punctulate. Body beneath pale fuscous, 

 the abdomen sparsely punctate and with few hairs. Legs pale yellow. Length 

 .12 inch ; 3 mm. 



Of this s|»ecies I have seen but the single specimen in the cabinet 

 of Dr. LeConte. The surface sculpture is less rough than in pilosa, 



