LeConte.] ERIRHININI. 185 



3. B. planatus, n. sp. 



Black, uniformly and densely clothed with dark cinereous scales. Beak 

 punctured, nearly naked, stout, curved, nearly as long as the prothorax ; 

 the latter is a little longer than wide, sides parallel, suddenly constricted 

 near the tip, disc coarsely granulate, feebly channeled. Elytra wider than 

 the prothorax, humeri less oblique, angulated, more prominent, striae fine, 

 interspaces very flat, fifth with a conical tubercle on the posterior declivity, 

 third with an obsolete elevation at about two-thirds the length. Antennae 

 and feet dark testaceous ; tarsi with third joint broader, emarginate. 

 Length 3 mm. ; .12 inch. 



Lake Superior and New York. Related to B. mammillatus, but the 

 striae of the elytra are finer, the interspaces still more flat, the tubercles 

 much smaller, the anterior one being hardly apparent, and the scales purer 

 gray, approaching lead color. 



4. B. obliquus, n. sp. 



Rather elpngate, black, variegated with pale and dark -brown scales. 

 Beak as long as the prothorax, stout, curved, flattened above, lateral grooves 

 not deep ; front with a short impressed line. Prothorax longer than wide, 

 broadly constricted at some distance from the tip; coarsely granulated, 

 dark brown with a broad pale lateral stripe. Elytra nearly one-half wider 

 than prothorax, humeri oblique, rounded, posterior callus not very promi- 

 nent, apex oblique, narrowly rounded ; striae deep, interspaces slightly 

 convex ; dark brown, with an oblique pale band commencing at the hume- 

 rus and reaching the suture a little behind the middle ; there are also a few 

 pale spots on the third and fourth interspaces. Antennae and legs brown, 

 third joint of tarsi a little wider, emarginate ; claws small. Length 2.3 

 mm.; .09 inch. 



Detroit, Michigan, and Florida ; Messrs. Hubbard and Schwarz ; many 

 specimens. The prothorax varies slightly in form ; the sides are nearly 

 straight behind, and usually parallel ; sometimes, however, they converge 

 slightly, so that the widest part is in front of the middle. The last joint 

 of the tarsi is shorter and the claws smaller than in B. planatus. 



5. B. americanus, n. sp. 



Elongate, black or brown, covered uniformly with silvery-gray scales ; 

 prothorax longer than wide, sides feebly rounded, a little narrowed and 

 broadly constricted near the tip, obscurely granulate. Elytra wider than 

 the prothorax, humeral angles obtuse, almost rounded, striae fine, distinctly 

 punctured. Antennas and legs testaceous, the latter long and slender, tibiae 

 strongly hooked, curved and armed with a row of small distant teeth on 

 the inner face. Tarsi longer than usual, joints 1-3 equal, fourth equal to 

 the two preceding. Length 4 mm. ; .16 inch. 



Middle States and Canada. I have adopted the name given in Dejean's 

 Catalogue. Easily known by its large size and elongate form ; there is a 

 marked difference in the beak of the two sexes ; that of the male is stout, 

 shining, very finely punctulate, not longer than the prothorax, and about 



AMER. PHILOS. SOC. XV. 96. X 



PROC. 



