184 GEO. H. HORN, M. D. 



very much larger. I place it in the present series because the tarsi are 

 slightly depressed and lack the filiform character of the species of series 

 D. The long and slender mandibles, without trace of the basal tooth, 

 mark it as a peculiar species in whatever group it is placed. 

 Two specimens, Vancouver. 



P. bucephalus n. sp. — Form rather slender and elongate, black, shining, 

 without aeneous lustre; antennae shorter than the head and thorax, black, joints 

 5-10 as wide as long ; head large and quadrate in both sexes, broader in the male, 

 nearly as large in area as the thorax, very black and shining, a few large punc- 

 tures only behind the eye ; thorax not wider than the head, sub-quadrate ; sides 

 sinuate posteriorly; surface black and shining, the dorsal punctures not large nor 

 deep; elytra pot wider than the thorax, a little longer than wide conjointly, black 

 shining, punctures rather fine, not closely placed, pubescence sparse, brown ; ab- 

 domen very sparsely punctate, shining, pubescence sparse, beneath as above, 

 basilar line straight ; legs piceous brown. Length .36 inch; 9 mm. 



ilia/e.— Anterior tarsi narrowlj' dilated; last ventral segment with a simple 

 triangular emargination. 



Female. — Anterior tarsi scarcely at all dilated ; last ventral entire. 

 Closely allied to the preceding species but smaller and more shining. 

 The elytra and abdomen are more distinctly punctured. The mandibles 

 are equally prominent and slender. The two differ at first sight in the 

 shorter elytra of jt^rversus. 



The legs are piceous, but sometimes reddish ; there is always a marked 

 contrast in color between the legs and coxae, the latter being always very 

 dark. 



Occurs in California and Vancouver ; not common. 



P. iiinbratilis Grav. — Black, moderately shining; elytra slightly aeneous, 

 surface sparsely brownish pubescent; legs piceous, or piceo-testaceous; antennae 

 piceous, a little longer than the head and thorax, joints 5-10 very slightly longer 

 than wide; head orbicular, or slightly quadrate, tlie hind angles with few small 

 punctures; thorax a little longer than wide, slightly narrowed in front; sides 

 slightly sinuate, disc moderately convex, dorsal punctures deeply impressed ; elytra 

 wider than the thorax, conjointly nearly square, moderately closely, not coarsely 

 punctate; abdomen above more finely and much less densely punctured than the 

 elytra, beneath more distinctly and more closely punctured than above. Length 

 .28— ..32 inch ; 7—8 mm. 



Jl/oZe.— Anterior tarsi rather broadly dilated; last ventral segment triangularly 

 emarginate, the emargination surrounded by a gutter. 



jp'ema/e.— Anterior tarsi very feebly dilated; last ventral entire. 

 Excepting the characters scheduled in the table there is nothing special 

 to distinguish this species. 



Occurs in Europe, and in our eastern Atlantic region, Mass., N. J. and 

 Lake Superior. 



P. la<'tulus Say. — Head, elytra and three apical segments black; thorax and 

 three basal segments red: antennae black, scarcely as long as the head and thorax, 



