126 AMERICAN COLEOPTERA. 



quite unable to distinguish tlieni. There is no sign in any of them 

 of a deflection of the tip of the abdomen, which, in the vast majority 

 of species, enables one to select the males regardless of any special 

 sexual character. 



26. A. recliisuin a. sp. — Robust, black, somewhat sliiuin^; pubescence 

 sparse. Beak very stout, as long as the prothorax ( % ). slightly longer and a trifle 

 less stout ( 9 )> dilfited, sparsely, fiuely punctate above, more closely and coarsely 

 at the sides; tip shining; supra antennal groove and puncture well marked. 

 First joint of antennse subequal to the two following, second about reaching the 

 eye. Front wide, punctate and deeply sulcate; eyes not prominent. Prothorax 

 large, transverse; apical constriction scai'cely evident ; sides divergent to about 

 one-fourth from the base, thence convergent; basal margin slightly expanded, 

 width in front of the base a little greater than at the base; punctuation coarse 

 and moderately close; basal impressed line reaching the middle or nearly so. 

 Elytra ovate, widest behind the middle; humeri small; intervals wide; feebly 

 convex on the disc; more strongly at the side. Beneath sparsely punctate; raeso 

 and metasterual side pieces clothed with closely-placed, white, scale-like hairs. 

 Legs not strong, slightly rufesceut; claws almost perfectly simple. Length 2.2 

 mm. ; .09 inch. (PI. Ill, figs. 2 and 2a). 



% . Middle and hind tibiae armed with a rather small mucro. 

 9 . Tibiae unarmed. 



Hub. — District of Columbia, New Jersey (Anglesea — Liebeek). 

 The sutural angles of the elytra are a little more rounded in the 

 male, but the difference is not conspicuous. 



27. A. pililCtiiiasuin Smith. — Elongate, black; pubescence plentiful, con- 

 spicuously condensed at the bases of the tiiird elytral intervals and in a post- 

 scutellar spot. Beak very short, scarcely as long as the prothorax ( 'S ), si little 

 longer ( 9 U feebly dilated, punctate throughout, the punctures only slightly 

 denser and stronger at the sides; tip polished. First joint of antennae short, 

 though nearly equal to the two following, third joint barely or not reaching the 

 eye. Front punctate, not sulcate; eyes small, not at all prominent. Prothorax 

 subcylindrical ; base not much wider than the apex, a little longer than wide: 

 apical constriction not well marked ; sides feebly divergent to the middle, thence 

 nearly parallel to the base; basal margin not expanded ; surface rather densely, 

 finely punctate, sometimes with an imperfect, median, impunctate line; basal 

 fovea small but strong. Elytra fully one-half longer than wide, widest behind 

 the middle; humeri not large; intervals nearly twice as wide as the striae, plane 

 or very slightly convex. Beneath rather closely, but not coarsely punctate; 

 claws simple. Length 2-2.6 mm. ; .08-.10 inch. (PI. Ill, figs. 3 and 3a). 



Hab. — Wyoming (Dr. Horn), Nevada (Wickham), British Co- 

 lumbia (Liebeek). 



No se.xual differences other than the slightly longer beak of the 

 female have been noticed. The elytra are faintly reneous in some 

 specimens. The condensation of the pubescence at the bases of the 

 third elytral intervals is more or less noticeable in many species; 



