460 CALIFORNIA ACADEMY OF SCIENCES. 



nent; antennae robust, as long as the head and prothorax together, club very 

 large, basal joint large, one-half longer than wide, as long as the next two 

 together, lower surface simple but more strongly convex than the upper, 

 second slightly longer and more robust than the third, joints three to eight 

 equal in width, ninth wider, transverse, tenth much wider than the ninth, 

 very slightly wider than long, subglobular, eleventh wider than the tenth, 

 conoidal, apices of joints six to nine slightly oblique; upper surface very 

 coarsely, feebly and sparsely punctate at the sides near the antennae, else- 

 where impunctate, not carinate. Prothorax as long as wide, widest just be- 

 fore the middle, where the sides are strongly rounded and rather prominent, 

 being abruptly and strongly sinuate and rather strongly convergent to the 

 base, broadly rounded to the apex; base scarcely one-fifth wider than the 

 apex, three-fourths as wide as the disk; the latter trisulcate; middle sulcus 

 narrow, deep, obsolete at one-fifth the length from the apex; having near 

 the base a very deep, round, nude median fovea, and two large, spongiose, 

 lateral foveae, between them bispinose with a longitudinal ridge proceeding 

 anteriorly from each spine, also tuberculate on each lateral edge near the 

 base; surface near the basal margin bifoveate laterally, ob^oletely and very 

 finely carinate in the middle. Elytra very sparsely, rather coarsely and 

 feebly punctate, each trifoveate at base; discal striae short, broadly, feebly 

 impressed; humeri minutely and distinctly spinose. Abdomen with two 

 short cusps at base. Legs rather long; femora robust; posterior tibiae with 

 terminal process. Length 2.0 mm. 



New York 1 (Mr. Henry Ulke.) 



Belongs near denticollis, from which it is easily distin- 

 guished by the form of the bidentate vertex, this being 

 declivous, with the teeth upon the lower edge in the present 

 species, and broadly emarginate, with the teeth porrected 

 and but very little below the level of the front in denticoUis.^ 



B. lucnlentUS n. sp.— Rather slender, polished, piceous; elytra slightly 

 paler and more rufous; legs pale; anteunje dark rufous, club paler; pubes- 

 cence rather sparse. 



Male — Head rather large, wider than long, wider than the prothorax, very 

 feebly convex, coarsely, sparsely and feebly punctate anteriorly, impunctate 

 posteriorly; eyes moderate, convex, prominent, near the base; foveae deep, 

 round, nude, at two-fifths the length from the base, mutually distinctly 

 more than twice as distant as either from the eye; arcuate groove fine, deeply 



* Note — From material recently sent me for identification by Dr. Emil 

 Brendel, I find that this species is widely diffused throiigh the North At- 

 lantic districts, there being specimens in the series indicated from New York 

 and Illinois. 



