[79] 



NORTH AMERICAN COLEOPTERA. 235 



tarsi slightly longer than the next two together; anterior tarsi distinctly 

 dilated. Under surface of the abdomen minutely, densely and evenly 

 punctate. Length 5.0 mm. 



California; (Placer Co. 1). Mr. Fuchs. 



The mesosternum is minutely and strongly rugulose and 

 alutaceous toward the middle, finely and imperfectly car- 

 inate posteriorly, more strongly so anteriorly, terminating 

 near the anterior margin in a small, abrupt, acute tubercle. 

 The abrupt loss of the dense pubescence at the tips of the 

 tibia? is very remarkable. 



This species is rather smaller and much more densely 

 punctate than longipalpus, and has a much less transverse 

 prothorax. 



AMPHICHROUM Kraatz. 



A. flavicome u - S P- — Moderately robust, depressed; pronotum and elytra 

 glabrous; abdomen very sparsely pubescent laterally; male black, with the 

 Literal edges of the pronotum and elytra testaceous; female having the entire 

 disk of the pronotum rufo-testaceous and the elytra luteous, except the 

 suture, which is piceous; antennae pale fiavate throughout; legs piceo-testa- 

 ceous ; integuments polished. Head scarcely longer than wide, depressed, 

 densely, rather coarsely and deeply punctate in the middle; having a small, 

 punctiform impression at the base of each antenna; obliquely and very 

 deeply bifoveolate between the eyes; antennte moderate in length, less than 

 one-half as long as the body, rather slender; basal joint three-fourths as long 

 as the next two together, second two-thirds as long as the third and about as 

 long as the tenth, joints three to ten decreasing perceptibly in length and 

 increasing in thickness. Prothorax two-thirds wider than long, widest in the 

 middle; sides strongly and nearly evenly rounded, slightly more strongly 

 convergent toward the apex, which is broadly and very feebly emarginate 

 and equal in width to the base and to the head; base truncate; apical and 

 basal angles broadly rounded, the former slightly the more narrowly so; disk 

 moderately and evenly convex, more strongly so at the sides, which are 

 narrowly and abruptly explauate, extremely sparsely, rather finely and very 

 unevenly punctate except along the sides and base, where the punctures are 

 much denser. Elytra at base very slightly wider than the prothorax; sides 

 very feebly divergent and nearly straight; together truncate behind; humeral 

 and exterior apical angles broadly rounded; disk as long as wide, slightly 

 less than twice as long as the prothorax, depressed, more convex at the sides, 

 narrowly elevated along the suture except near the base, feebly, rather 

 sparsely and unevenly punctate. Abdomen as wide and long as the elytra; 

 aides strongly arcuate; surface shining, extremely finely and feebly punctate, 



