52 BULLETIN 48, UNITED STATES NATIONAL MUSEUM. 



Grouiul color a jjale luteous, powdered with darker scales. Head 

 and tliorax concolorous. Primaries witli the markiii^iis evident, though 

 not prominent, without contrasting siiades. Basal line a aguely marked 

 in some specimens. Transverse anterior line slender, brown, rarely 

 indistinct, slightly outcurved, a little drawn in on the median vein. 

 Transverse posterior line slender, somewhat dilated on the costa, reg- 

 ularly and somewhat variably outcurved over the cell, and rather 

 evenly oblicpie or with a small incurve below. Subtermiual line vague, 

 marked as a somewhat diffuse, indefinite dusky shade, which is some- 

 times scarcely traceable aiul sometimes fairly marked, occasionally 

 forming a dusky apical si)ot. Through the outer portion of the mediau 

 S])ace is a broad, diffuse, often indistinct, always indefinite, darker, 

 brown shade band, involving the slender lunule which represents the 

 reniform. Orbicular wanting, or marked only ))y a small dot on the 

 transverse anterior line. A slender, dark, continuous terminal line, 

 followed by a more or less obvious pale line at the base of the fringes. 

 Secondaries j)aler, sometimes whitish, with a darker median line, most 

 evident in i)ale specimens, and an incomplete outer pale line, defined 

 toward the inner nuirgin by a preceding dusky shade. Beneath, witli 

 coarse, ocherous i)owderings, with a distinct, brown common extra- 

 median line and a distinct discal dot on all wings. 



Expanse of wings, 21 to 20 mm. = ().sr) to 1.0.") inches. 



Habitat. — IsTova Scotia, southward to A'irginia; Central States; 

 New York in .June, July, and August. 



The species is not rare, and varies within narrow limits only. The 

 ground color may be somewhat lighter or darker, and the powdering 

 more or less evident, and as the specimens are darker the lines are 

 less distinct and the median shade band becomes more obvious; and 

 such specimens, when imperfect, may be confused with P. euniduHiUs 

 if the structural (characters are not looked to. The palpi have been 

 already referred to, and it is a m-atter of regret that Mr. Grote's expres- 

 sive name could not have been retained. 



The male antenna' are lengthily bi pectinated, the branches slender, 

 setose, the surlace imbricated very nuich as m the Aphidida', becoming- 

 shorter and somewhat clavate toward the tip; not furnished with a 

 longer terniinai bristle. In the female the joints are shorter and are 

 feebly ciliated. 



The forelegs of the male are much as in Hormlaa. The coxa is long, 

 furnished with an imperfect scale tuft at the a|)ex. The trochanter 

 equals the femur in length. Femur rather stout, with a diffused sen- 

 sitive surface beneath, and long, specialized scales, not forming tufts. 

 The tibia consists mainly of epi[)hysis and process, forming a sort of 

 pouch concealing long specialized scales, and concealing all save the 

 terminal joint of the tarsi. 



In the fore wings examined, Acin 10 arises from the accessory cell 

 near its tip, indeitendent of <S, 



