NORTH AMERICAN COLEOPTERA. 18:5 



broader than long, scarcely narrower in front; sides distinctly sinuate posteriorly ; 

 surface very smooth and sliining, dorsal punctures deep; elytra wider than the 

 thorax, longer than wide conjointly, black, very shining, [>unctures relatively fine 

 and sparsely placed, pubescence sparse and black; abdomen black, shining, very 

 sparsely punctate and pubescent, basilar line of segments straight, l)enoath shin- 

 ing, sjiarsely punctate: legs black. Length .40 inch; 10 mm. 



Male. — Anterior tarsi moderately dilated, last ventral with a tri:iiigular ernargi- 

 nation surrounded by a gutter. 



Female. — Anterior tarsi rather slender, last ventral entire. 



The only species with wliicli this might be confounded h/itrrus, from 

 whicli it differs by its very black surface, much less densely punctured 

 elytra and abdomen, and the more narrowly dilated tarsi of the male. 



Occurs in Vancouver, Wash. Territory, and also in the soiith of Cali- 

 fornia ; not common. 



P. allitaceus n. sp. — Very black, elytra sub-opaque ; surface sparsely clotheii 

 with black j)ubescence; antennse black, a little longer than the head and thorax, 

 the outer joints a little longer than wide; head black with slight aeneous lustre, 

 hind angles numerously punctured ; thorax slightly aeneous, a little wider than 

 long, not narrowed in front; sides distinctly sinuate posteriorly, disc convex, dor- 

 sal punctures deeply impressed; elytra a little wider than the thorax, conjointly 

 nearly square; surfnce densely punctate-scabrous, and not shining; abdomen 

 rather closely coarsely punctate on the basal segments, less closely on the apical, 

 beneath equally coarsely but less closely punctate than above; legs black. Length 

 ..•5(5— .48 inch ; 9—12 mm. 



Male. — Anterior tarsi moderately dilated; last ventral segment broadly trian- 

 gularly emarginate, the emargination surrounded by a gutter. 



Female. — Anterior tarsi less dilated than in the male; last ventral segment en- 

 tire. 



This species is closely related to aeneus, but its totally black .surface, 

 opaque elytra and longer antenni\3, mark it ;is (juite u distinct species. 



Occurs in the southern regions of California. 



P. perversilS n. sp. — Form elongate, parallel, piceous moderately shining; 

 legs paler; antenna? barely as long as the head and thorax, brownish, joints 7-10 

 as wide as long; head rather large, broadly oval, hind angles not punctulate; 

 mandibles long and very slender; thorax not wider than the head, as wide as long, 

 equally broad at apex and base ; sides slightly sinuate posteriorly, dorsal punctures 

 deep; elytra not wider than the thorax and not as long, conjointly wider than 

 h)ng, coarsely not densely punctured, sparsely pubescent; abdomen above shining, 

 jnniciuation sparse and finer than that of the elytra, beneath more numerously 

 j)unclured than above ; legs piceo-testaceous, coxse darker. Length .46 inch ; 11.5 

 mm. 



Male. — Unknown. 



Female. — Anterior tarsi not dilated ; last ventral entire. 



This species, in its form and general appearance, is totally unlike any 

 of the species of the present series except hucephalus. It recalls rather 

 some of the species of series D, notably hrrvipennis, than which it is 



