Genus Pholisora 



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together with a few threads of silk. It lies concealed during the 

 day and feeds at night. A minute account of all its peculiarities 

 is given by Scudder in "The Butterflies of New England," vol. 

 ii, p. 1519. 



The insect ranges over the whole of temperate North America. 



(2) Pholisora hayhursti, Edwards, Plate XLVIII, Fig. 16, ? 

 (Hayhurst's Skipper). 



Butterfly. Easily distinguished from the preceding species 

 by the somewhat crenulate shape of the outer margin of the hind 

 wings, the white color of the under side of the abdomen, and 

 the different arrangement of the white spots on the fore wings, as 

 well as by the dark bands which cross both the fore and the 

 hind wings on the upper side. Expanse, .90-1. 15 inch. 



Early Stages. Our information as to these is incomplete. 



The species ranges from the latitude of southern Pennsylvania 

 westward and southward to the Gulf, as far as the Rocky Moun- 

 tains. 



(3) Pholisora libya, Scudder, Plate XLVIII, Fig. 14, 6 (The 

 Mohave Sooty-wing). 



Butterfly. Easily distinguished from the two preceding spe- 

 cies by the white fringes of the wings and by the markings of 

 the under side. The primaries on the lower side are dark, tipped 

 at the apex with light gray, and in the female having the costa 

 and the outer margin broadly edged with light gray. The hind 

 wings are pale gray of varying shades, marked with a number 

 of large circular white spots on the disk and a marginal series of 

 small white spots. Expanse, $, .80-1.25 inch; ?, 1.15-1.40 

 inch. 



Early Stages. These await full description. 



This species is found from Nevada to Arizona, and is appa- 

 rently very common in the Mohave Desert. 



(4) Pholisora alpheus, Edwards, Plate XLV, Fig. 2, $ (Al- 

 pheus). 



Butterfly. This little species is nearer P. hayhursti than any 

 of the others we have described, but may at once be recognized 

 and discriminated by the checkered margins and white tip of the 

 fore wing and the linear shape of the spots composing the sub- 

 marginal and median bands on the upper side of this wing. The 

 hind wings on the under side are marked with a number of light 

 spots arranged in marginal and median bands. 



