NORTH AMERICAN COLEOPTERA. 199 



var. alumnus Er. — Blaok, legs piceoiis to testaceous. 



var. rufuliis Fv. — Black, elytra red, varying to pale brown ; legs testaceous. 



var. atriceps Fv. — Black, thorax and elytra red ; legs pale. 



The males are very readily distinguished from any other in the group 

 by the ventral sexual characters. The females, however, resemble ful- 

 vipes, but are more densely punctured and opaque. 



The species was originally described from Porto Rico, but it seems 

 widely spread in our territory. It is known to me from Florida to 

 Arizona, and as far north as New York. 



P. iniiocutis n. sp. — Piceous, thorax and elytra red, legs testaceous ; antenna 

 as long as the head and thorax, rather slender, piceous, two basal joints paler, 

 joints all longer than wide; head broadly oval, hind angles punctured; thorax 

 very little wider than the head, longer than wide; sides nearly parallel, dorsal 

 jpunctures moderately deep and equidistant; elytra wider than the thorax, con- 

 aoinlly nearly square; surface slightly shining, moderately densely punctured- 

 bdonien* moderately densely punctured, the punctures a little coarser than those 

 of the elytra; beneath moderately densely punctured, a little more coarselv tlian 

 above. Length. 18 — .20 inch; 4.5 — 5 mm. 



Male. — Anterior tarsi moderately dilated ; last ventral with a l)roa(l triangular 

 emargiuation surrounded by a gutter. 



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



While I have seen but few specimens of this species there seems to be 

 a tendency to variation. The base and sides of the elytra are sometimes 

 ])iceous as well as a broad space at the base of the thorax. It is prob- 

 able that varieties will occur totally black. 



A?: the thorax is scarcely perceptibly narrowed in front, the only species 

 with which this is likely to be confused are altnniiiis and fuln'pcs from 

 both of which the male sexual characters must be referred to ibr sepa- 

 ration. 



Occurs in Arizona. 



I*, thoraciciis Grav. — Piceous or black, thorax and elvtra red, Ics testa- 

 ceous; antennie slender, longer than the head and thorax, piceous, three basal 

 joints paler, joints all longer than wide ; head oval, hind angles sparsely punctate ; 

 thorax wider than the head, oval, verj' obviously narrowed in front, dorsal punc- 

 tures moderate, equidistant ; elytra conjointly broader than long, not longer nor 

 wider than the thorax; surface slightly shining, moderately densely punctured, 

 sparsely pubescent; abdomen less densely but more coarsely punctured than the 

 elytra; beneath more shinins. and rather more coarsely punctured than above. 

 Length .".2 inch; 8 mm. 



J/a/c— Anterior tarsi moderately dilated : last ventral segment triangularly 

 omarginate, the notch surrounded by a gutter which extends forward on the seg- 

 ment. 



Female. — Anterior tarsi quite slender; last ventral entire. 

 This species although rather long, is quite slender. It is readily known 

 by its coloration, which seems to be constant, iind bv the iartre thorax. 



