38 MISC. PUBLICATION 6 9 8, IT. S. DEPT. OF AGRICULTURE 



Distribution. — This species is widely distributed over the eastern 

 half of the United States. Specimens have been examined from the 

 District of Columbia, Florida, Georgia, Illinois, Iowa, Kansas, Mary- 

 land, Massachusetts, New Jersey, New York, North Carolina, Pennsyl- 

 vania, South Carolina, Texas, and Virginia. Gorham (1883, 1886) 

 lists it from Guatemala, Nicaragua, and Mexico, but it is possible that 

 it is a misidentification for t? v u?icatus Horn, which is very common in 

 Mexico and Central America. 



Hosts. — This species has been reared from oak in North Carolina 

 and pecan in Georgia. Chittenden (1911) stated that this species 

 appears to confine itself to dead roots and stumps, and, so far as known, 

 has not attracted any attention by its presence indoors. 



Melsheimer (1806) listed this species in his Catalogue of the Insects 

 of Pennsylvania without giving any description, but probably it was 

 collected in York County or near Philadelphia. Say (1826) described 

 the species without giving any locality, but citing the Melsheimer 

 Catalogue. 



The tubercles on the apical declivity of the elytra are variable in 

 size and number. Usually there is a distinct tubercle on each elytron ; 

 sometimes there are two very close together on each elytron, rarely 

 these are obsolete. The ones having the tubercles obsolete can be 

 separated from truncatus in having long, recumbent hairs on the apical 

 declivity. The sexes in this species can be easily separated by having 

 the apical declivity of the elytra coarsely, uniformly punctate in the 

 females and more or less smooth along the sutural margins in the males. 

 The tubercles on the anterior margin of the clypeus are variable in 

 number. 



Prostephanus arizonicus, new species 



Uniformly dark reddish brown, the palpi and antennae slightly 

 paler. 



Head with front densely, deeply, irregularly punctate, sparsely 

 clothed with short, inconspicuous, semierect hairs, abruptly deflexed 

 at anterior margin ; clypeus flat, densely, shallowly punctate, sparsely 

 clothed with short, inconspicuous, erect hairs, with six vague, obtuse 

 tubercles along anterior margin. Antennal club densely clothed with 

 short, recumbent, yellowish hairs, with a few long, erect hairs inter- 

 mixed, the segments transverse, oval. 



Pronotum strongly, uniformly convex, widest at basal third, with a 

 distinct longitudinal groove at middle of disk; sides with a row of 

 small teeth on each side near posterior angles ; surface sparsely clothed 

 with short, inconspicuous, recumbent hairs, coarsely, rather densely 

 punctate at sides, smooth and sparsely punctate at middle of disk, 

 coarsely, vaguely imbricate in front of scutellum, the imbrications 

 broad and broadly rounded at apices, and with transversely arcuate 

 rows of elevated teeth at middle on apical half, the teeth obtusely 

 rounded at apices and distinctly separated from one another, except 

 the two median ones on anterior margin, which are nearly contiguous. 



Elytra at base subequal in width to pronotum at basal third ; sides 

 parallel, conjointly broadly rounded at apices ; surface rather coarsely, 

 densely, irregularly punctate, sparsely clothed with short, recurved, 

 yellowish hairs, which are about as long as the intervals between 

 punctures on anterior part of disk ; apical declivity sparsely, coarsely 



