AMERICAN COLEOPTERA. 287 



A. valida n. sp. — Oblong-oval, moderately robust, piceovis varying to paler, 

 moderately shining. Head sf)arsely punctate, vertex with an arcuate row of 

 coarser punctures. Thorax twice as wide as long, a little narrower in front, 

 widest in front of base, apex einarginate, sides and base arcuate, hind angles 

 distinct but obtuse, surface sparsely punctate with a row of coarser punctures 

 along the base. Elytra oblongoval, a little wider than the thorax, sides moder- 

 ately arcuate, surface moderately deejjly 8-striate, the outer stria abbreviated 

 but rarely with subhumeral stria, strise rather coarsely crenately punctured, 

 the intervals slightly convex, very finely punctulate, the alternate intervals 

 with coarse punctures distantly placed. Metasternum very finely alutaceous, 

 obsoletely punctate at the sides, abdomen sparsely punctate. Length .14 — .24 

 inch; 3.5—6 mm. (PI. VII, fig. 2). 



Male. — Anterior and middle tarsi very slightly dilated. Posterior femur 

 moderately stout, broadest at middle where it is subangulate or slightly den- 

 tate, the lower edge on the outer side slightly crenulate between the middle 

 and the base, the inner condyle slightly prolonged. Posterior tibiae rather 

 slender, gradually stouter to apex, and strongly arcuate in its entire length. 

 (PI. VII, fig. 2 a). 



Female. — Anterior and middle tarsi long and slender. Posterior femur not 

 stout, the tibia straight and a little shorter than th« male. 



This species has a resemblance to some of our forms of Phaleria, 

 and in the present genus is somewhat troublesome to distinguish 

 from asslmilU and the male characters must be relied on. By com- 

 parison the two are readily separable. 



The distribution of this species is transcontinental on our northern 

 line, extending from the White Mountains (Austin) to Canada, Colo- 

 rado and Vancouver. 



A. assiinilflS Lee. — Oblong-oval, piceous or rufo-piceous, shining. Head 

 sparsely punctate with an arcuate row of coarser punctures. Thorax twice as 

 wide as long, narrowed in front, apex emarginate, sides arcuate, base truncate, 

 hind angles distinct but obtuse, surface sparsely punctate with coarser punc- 

 tures at the sides of base. Elytra very little wider than the thorax, oval, a 

 little longer than wide, sides moderately arcuate, surface with eight rows of 

 moderately coarse, closely placed punctures, a distinct subhumeral short row 

 of punctures, intervals slightly convex, obsoletely punctulate, the alternate 

 intervals with coarser distant punctures. Metasternum alutaceous, obsoletely 

 punctate. Abdomen alutaceous, sparsely punctulate. Length .14 — .16 inch ; 

 3.5 — 4 mm. 



Male. — Anterior tarsi slightly dilated. Posterior femur not dilated at middle, 

 the lower anterior edge crenulate, the tibia slender, strongly arcuate and flat- 

 tened on the inner edge. (PI. VII, fig. 3). 



Female. — Tarsi slender. Posterior femur similar to the male but not crenu- 

 late, the tibia shorter than the male, stouter and more spinulose. 



Closely resembling valida this species may be separated by the male 

 characters. It will be observed that the short subhumeral stria is here 

 always present and rather distant from the margin, while in valida it 

 is only exceptionally present and not distant from the maigin. 



