EASTERN UNITED STATES. 335 



the basal half of the hind part is black. The fore wings 

 have two pale spots in the median interspaces, the upper 

 whitish and about one-third the size of the lower. Inner 

 margin of hind wings sprinkled with gray. Fringes 

 white, gray at the base. 



Female. — Upper surface of the same general color as 

 in the male, with very few of the yellow scales, and those 

 mostly along the costa of the fore wings. There are 

 two pale spots in the median interspaces ; the anteapical 

 scales as in the males. The hind wings have fewer of the 

 olive-yellow hairs. Under side as in the males, with 

 less gray on the inner margin of the hind wings. 



Body black, the hairs of the thorax of nearly the same 

 color as the yellow on the fore wings, those on the 

 abdomen olive-yellow. Under side of body and palpi 

 white. 



Larva and food-plant unknown. 



The butterfly is found in July from New England to 

 Nebraska ; Illinois. 



161. Pamphila Pontiac, Edw. 



Expanse of wings from 1.25 to 1.4 inches. 



Male. — Upper surface dark blackish brown or fuscous, 

 the basal two thirds of the fore wings so heavily washed 

 with rather dark yellow as to make it clear yellow, sepa- 

 rated by the brown veins in the cell, beyond the stigma 

 and in the subcostal interspaces ; the base of the wing 

 and the bases of the subcostal interspaces having but 

 little of the yellow, as also the area below the subme- 

 dian vein. Stigma oblique, rather broad, velvety black, 

 broken by the lower median venule into two elliptical 

 parts which join by their oblique ends; the upper end 



