328 NATURAL HISTORY UOLLEC'-'IOXS IN ALASKA. 



PiERis Nelsoni Edwards. 



Oue male taken at Saiut Michaels June, 1831. The species is near CalUdice Esper, but 

 differs in the coloration of the under side, which is gray-brown instead of green ; and on upper 

 side, in the shape of the cellular spot, which is a short oval, instead of a long curved bar ; also in 

 the presence of a spot in the sub-mediau interspace. Mr. A. G. Butler informs me that the British 

 Museum collection contains a similar male labeled "North America." I named the species after 

 Mr. E. W. Nelson, and figured it in Butterflies of North America, volume 2, part 10, plate 1, of 

 Pieris,18S3. 



Genus COLIAS Fabricius. 



OoLiAS Hecla Lefebvre var. Hela Strecker. 



One male and one female were taken at Kotzebue Sound July 14, 1881. The male is similar on 

 both surfaces to an example which I have from Greenland, but the female is much more yellow 

 than a Greenland female and another from Cumberland Island, and less obscured by black on 

 both surfaces than these. The under side is of the same yellow-green hue of the male. The 

 species spems to be restricted to the Arctic regions, but flies from Greenland to Alaska. 



CoLiAs Chippewa Edwards. 



One white female taken at Saint" Michaels August 0, 1878; one white female and one yellow 

 female at Kotzebue Sound July 11, 1881. These are all of same size aud style of marking as the 

 female figured in Butterflies of North America, volume 1 (under the name of Helena, which name 

 was found to have been preoccupied and Cliippetca was substituted for it). The under side of 

 hind wing in this species has the discal spot small, silvery, with no border. The examples origi- 

 nally described were taken at Fort Simpson, and probably the species flies over the boreal and 

 Arctic regions to the northwest. 



Family NYMPHALID.S:. 



^subfamily NIMPHALIN^. 



Genu8 ARGYNNIS Fabricius. 

 Argynnis Freya Thunberg. 



One male aud one female, taken at Saint Michaels, do not differ from Colorado aud Labrador 

 specimens. Frexja follows the !Rocky Mountains as far as South Colorado, at high elevations. 

 One male was taken at Kotzebue Sound July 13, 1881, and is very black. 



Argynnis frigga Thunberg. 



Oue male and one female, taken at Saint Michaels, do not dilfer from examples taken at Fort 

 Simpson, but are somewhat larger than all I have seen from Labrador. This species also flies in 

 the Rocky Mountains and Colorado. 



Argynnis Butleri Edwards. 



This species I described in the Canadian Entomologist, volume xv, page 32, 1882, from one 

 male taken at Kotzebue Sound July 11, aud another at Cape Thompson July 19, 1881. It is allied 

 to A. chariclea, from which it "differs iu the redder coloration and much heavier markings on the 

 upper surface ; the basal area is blacker, the spots and stripes much thicker. Below the mark- 

 ings are altogether darker than in chariclea, whether of Europe" (or America). — Butler. Mr. 



