NORTH AMERICAN COLEOPTERA. 187 



While closely related to the preceding species, the present one is more 

 elongate ; head more quadrate, and the thorax also nearly s((uare, not at 

 all narrowed in front. The antennjo are also stouter and shorter. 



Collected by E. A. Schwarz at Columbus, Texas. 



P. atratus Grav. — Black, shining, tibiae and tarsi piceous; antcnnfB black, as 

 long as the head and thorax, joints 4-10 longer than wide ; head quadrate (ival, 

 hind angles smooth ; thorax oval, a little wider than the Iiead, slightly longer than 

 wide, distinctly narrowed in front; sides slightly sinuate, dorsal punctures mod- 

 erately impressed; elytra black, with slight aeneous tinge, wider than the thorax, 

 conjointly nearly square; surface very sparsely punctate and scarcely pubescent j 

 abdomen above sparsely, coarsely punctate, beneath also very sparsely punctate. 

 Length .28 inch; 7 ram. 



Male. — Anterior tarsi moderately dilated; last ventral segment rather deeply 

 triangularly emarginate, the notch surrounded by a well marked gutter. 



Female. — Anterior tarsi nearly as widely dilated as in the male; last ventraj 

 entire. 



This species bears a close resemblance to sordidm and cephalotrs in 

 color, sculpture and size, and might readily be mistaken for the former, 

 especially, except that in the present species the front tarsi are dilated in 

 both sexes. 



I have seen but two specimens, — a male without locality, and a female 

 i'rom Hudson's Bay, botli in the cabinet of Dr. LeCoute. 



1*. seiniruber n. sp. — Form rather slender, color piceous black; elytra, coxae 

 and legs ferruginous; autennse brownish, as long as the head and thorax, joints 

 4-fi a little longer than wide, 7-l(i nearly square; head oval, nearly orbicular 

 hind angles sparsely punctate; thorax a little larger than the head, oval, longer 

 than wide, distinctly narrowed in front; sides slightly sinuate, dorsal punctures 

 rather fine; scutellum black, rather closely punctate; elytra a little wider than 

 the thorax, conjointly nearlj' square, sparsely rather finely punctate, and with 

 brownish pubescence; surface feebly shining; abdomen shining, sj)arsely pubes- 

 cent, punctures much coarser than those of the elytra, but more distant, beneath 

 a little more closely and finely punctate. Length .30 — .34 inch; 7. .5 — H.a mm. 



Male. — Anterior tarsi moderately dilated ; last ventral segment with a small 

 triangular emarginatioii surrounded by a distinct gutter. 



Female. — Anterior tarsi slightly but distinctly dilated; last ventral entire. 



The characters above given will distinguish this species from any in 

 the present group. The following species has also reddish elytra, and 

 will be referred to. Nearly all the species with reddish elytra have five 

 thoracic dorsal punctures. 



Occurs in California and Arizona. 



P. busalis n. sp. — Form rather robust, thorax and elytra reddish brown, 

 coxic and legs paler; antenna; scarcely as long as the head and thorax, piceous, 

 the basal joint yellow, joints 4-10 short, as broad as long; head orbicular, hind 

 angles sparsely punctate ; thorax oval, a little wider at base than long, wider than 

 the head, very feebly sinuate at the sides, distinctlv narrowed in front, dorsal 



