136 AMERICAN COLEOPTERA. 



Hab. — Kansas, Nebraska, Texas, Colorado, ^lontana (Fort 

 Assiniboine). 



A series collected by Mr. Schvvarz in the latter locality shows a 

 more transverse prothorax, with base and apex more nnequal, shorter, 

 more arcuate beak, wider less convex elytral intervals, and less 

 shining surface. With these, however, occurred individuals agree- 

 ing with those from further south. The fully armed male tibiae, 

 combined with the peculiar tarsal structure and shining surface, are 

 sufficient to identify this very distinct species. 



37. A. a'lieipeiine Smith. — Moderately elongate, black ; prothorax opaque: 

 elytra with purplish bronze lustre; tibije, base of femora and basal joints of 

 antennte rufous; pubescence fine and sparse. Beak scarcely differing in the 

 sexes, moderately strong, as long as the head and prothorax, parallel, dilated 

 about one-third from the base, tip slightly broader; surface finely strigose and 

 punctate; tip polished. Antennje rather short, first joint about equal to the sec- 

 ond and thinl united, seventh and eighth transverse, second reaching the eye. 

 Front strongly pun(-tate, the punctures tending to coalesce longitudinally; eyes 

 not large, moderately prominent. Prothorax a little wider than long ; base not 

 much wider than the apex, widest two-fifths from the base ; sides arcuate ; apical 

 constriction feeble; basal margin not expanded, densely, strongly punctate; basal 

 fovea small, punctiform. Elytra about two-thirds longer than wide, very slightly 

 wider behind the middle; sides subparallel; humeri moderate; intervals wide, 

 flat. Beneath densely, rather coarsely punctate; nieso and metasternal side 

 pieces clothed with white squamiform hair; legs moderate. Length 2.4 mm.: 

 .095 inch. 



% . Sutural angles rounded : middle and hind tibipe with small, non-dentel- 

 late rancro. 



f. Sutural angles not rounded ; tibife unarmed. 



Hub. — District of Columbia. 



Described from one male and four females; collections of Mr. 

 Schwarz and Dr. Dietz. The single male shows a tubercle near the 

 base of the first ventral, which is probably not accidental. 



A fine species and evidently rare. It is easily distinguished by 

 the characters in the table. 



38. A. iinpexiiiii n. sp. — Black, rather densely clothed with whitish 

 squamiform hairs, which are easily removed. Beak slender, not strongly arcuate, 

 cylindrical, as long as or a little longer than the head and prothorax, and rather 

 feebly dilated ( %, ), decidedly longer, not dilated ( J ), with fine sculpture at base, 

 a furrow over the insertion of the antennse, beyond which it is entirely polished 

 with very few, fine punctures. Antennae moderate, first joint equal to the next 

 two, second slender, three-fourths as long as the first, and equal to the third and 

 fourth together, third reaching the eye. Front punctate, the punctures tending 

 to arrange themselves in longitudinal lines; eyes small, widely separated but not 

 prominent. Prothorax as long as wide, widest near the middle; apical margin 

 thickened; sides rounded to the base; surface densely, not very coarsely punc- 



