192 GEO. H. HORN, M. D. 



The extent of the pale marking of the elytral margin is somewhat 

 variable, but it seems not to reach the humeri, and in extending along the 

 apical margin becomes gradually broader internally. 



Occurs in the Gulf States and Arizona, extending to South America. 



P. palliatus Grav.— Form parallel, black, shining, elytra, legs (except the 

 coxse) and base of antennse rufo-testaeeous ; antennre piceous, a little shorter than 

 the head and thorax, joints 5-10 nearly square; head orbicular, or nearly quad- 

 rate, hind angles distinctly punctulate ; thorax quadrate, a little longer than wide, 

 not narrowed in front; sides slightly sinuate, dorsal punctures large, deep and 

 equidistant; elytra scarcely wider and not longer than the thorax, conjointly a 

 little longer than wide, shining, rather distantly and coarsely punctate, pubescence 

 sparse ; abdomen coarsely but not closely punctate, beneath more coarsely and 

 closely punctured than above. Length .26 inch; 6.6 mm. 



J/ftZe.— Anterior tarsi very broadly dilated; last ventral segment broadly trian- 

 gularly emarginate, with a deep triangular impression extending nearly to the 

 base of the segment; penultemate segment flattened at middle, the posterior mar- 

 gin slightly sinuous. 



Female. — Anterior tarsi very narrowly dilated ; last ventral entire. 

 This species is easily known. It is the only one in the present group 

 in our fauna with clear red elytra. The only species at all similar occur 

 in the next group, and have the dorsal series of rather small punctures, 

 with either more closely punctate elytra, or the thorax distinctly narrowed 

 in front. 



Occurs in Canada, the Middle States, and as far west as Colorado. 



P. pubes n. sp. — Black, legs piceous, front coxfe and femora conspicuously 

 paler; elytra sometimes reddish brown or clouded ; antennae as l<mg as the head 

 and thorax, piceous, two basal joints testaceous, joints 4-10 distinctly longer than 

 wide ; head orbicular, hind angles nearly smooth ; thorax wider than the head, as 

 broad as long, scarcely perceptibly narrowed in front, convex, very shining, dorsal 

 punctures rather fine, the posterior more distant; elytra scarcely wider than the 

 thorax, conjointly nearly square, not very coarsely but moderately densely punc- 

 tured, sparsely pubescent; abdomen very densely and very finely punctured, pu- 

 bescence fine and velvety, beneath punctured as above. Length .20— .22 inch; 5 

 — 5.5 mm. 



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

 triangular cmargination surrounded by a distinct gutter. 



Female. — Anterior tarsi nearly as widely dilated as the male: last ventral trun- 

 cate, slightly sinuate at middle. 



The color of the elytra may be described as nearly black, with an ob- 

 long reddish humeral spot reaching nearly the apical margin, the suture 

 also pale. From this the elytra may become almost entirely red, or very 

 nearly all black. This species may be especially distinguished by its very 

 fine and dense abdominal punctuation. 



This species is closely related to .sangvinolenfus Grav., and represents 

 that species in our fauna. It is shorter and more robust, and with the 



