NORTH AMERICAN COLEOPTERA. 1!>1 



tured, sparsely clotlied with brownish hair; abdomen punctured very like the 

 elytra but less densely, beneath more shining, a little more finely but less densely 

 punctured than above, coxce and femora reddish yellow; tibise and tarsi black. 

 Length .24 inch; 6 mm. 



Male. Anterior tarsi very broadly dilated ; last ventral segment deeply trian- 

 gularly emarginate, the emargination surrounded by a deep wide gutter extending 

 nearly to the base of the segment. 



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



This species is known in the present group not only by the 'characters 

 given in the table, but also by the very slender antennae. 

 Occurs in Arizona. 



P. iimbriniis Grav. — Form moderately elongate, black, shining; legs pice- 

 ous or testaceous ; antennte shorter than the thorax, black, joints 4-10 gradually 

 shorter and a little wider than long; head orbicular or sub-quadrate, larger in the 

 male, hind angles sparsely punctulate ; thorax oval, a little longer than wide, nar- 

 rowed in front ; sides not sinuate, convex, dorsal moderately impressed, the poste- 

 rior more distant than the others; elytra a very little wider than than the thorax, 

 conjointly nearly square, black or piceous, very shining, moderately coarsely not 

 densely punctured, pubescence sparse, brown; abdomen black, iridescent, punc- 

 tuation sparse, about equal in coarseness to that of the elytra; legs piceous, or 

 piceo-testaceous. Length .2fi — .32 inch ; 6.5 — 8 mm. 



Ma/e. — Anterior tarsi rather broadly dilated; last ventral with a triangular 

 emargination surrounded by a narrow gutter. 



i^e»ia/e.— Anterior tarsi slightly dilated ; last ventral entire. 



The species which I hade here identified as umbritms, has l^pen known 

 in our collections, and distributed as holetariiis, a manuscript name im- 

 posed by the late Dr. Zimmerman. In general aspect it resembles some 

 of the smaller forms of (ititeus. 



Occurs from New York to South Carolina. 



I*, flttvoliinbatus Erichs. — Form slender, black or piceous, side margin 

 and ai)ices of the elytra, legs and base of antennae testaceous ; antennae brownish, 

 a little shorter than the head and thorax, joints 5-10 nearly square; head black, 

 oval, hind angles smooth; thorax oval, a little longer than wide, narrowed in 

 front; sides slightly sinuate; surface smooth, slightly bron/ed, dorsal punctures 

 moderately impressed, the posterior a little more distant; elytra not longer and a 

 little wider than the thorax, conjointly slightly wider than long; surface shining, 

 slightly brf>nzed, punctuation moderately fine not dense; abdomen much more 

 finely and sparsely punctured than the elytra, beneath piceous, the segments paler 

 at their apices, the punctuation fine, a little more dense than above. Length .14 

 — .22 inch; 3.5-5.5 mm. 



Male. — Anterior tarsi very broadly dilated, almost patellate ; last ventral seg- 

 ment broadly triangularly emarginate with a broad gutter surrounding the notch ; 

 penultimate segment slightly sinuous at the middle of the posterior margin. 



J^ewa/e.— Anterior tarsi narrowlv dilated ; last ventral entire. 



