74 



Hopedale, Indian Harbor, Henley Harbor, and Caribou Island, Straits 

 of Belle Isle, Augusl (Packard). 



This is a truly arctic species, being found in ( rreenland and Lapland, and 

 the colder, exposed, treeless portions of the Labrador coast. It has not vet 

 been detected on the alpine summits of New England or the Rocky Mountains, 

 or in the European Alps. 



This arctic species differs from any other in the grayish-white wings, 

 peppered with dark scales, with a distinct, median, dark band, paler in the 

 middle, and usually forked on the costa. 



Seventy-five specimens were captured by me in a single day (August 22), 

 on a naked, almost bare rock, at Table Island, in Henley Harbor, which is 

 much exposed to the open sea. They were in great abundance, settling down 

 with their peculiar vacillating flight, like feathers, on the ground. There was 

 considerable variation among them. Some were more dusky than others, wit h a 

 greater profusion of golden scales. In others, the central dark band of ringlets 

 became reduced to mere points on the inner edge, with the region on each side 

 very pale and almost entirely free from yellow scales, or the entire line may 

 consist of points alone, accompanied by a broad, dusky, submarginal band. 

 Others have no yellow scales at all, and the mesial band is diaphanous, leaving 

 the discal dot very distinct, while all the characteristic bands and rows of 

 dots are brought out in very clear relief, as in Lefebvre's var. Brullei. The 

 size of the dusky spots on the fringe varies greatly. 



The most aberrant example has whitish-gray wings, with fewer dark 

 lines Iban usual. The base of the fore wings is black; beyond is a broad 

 dark line, while the median dark baud is narrow, almost obsolete, consisting 

 of isolated square spots, with a large, discal, double patch, and a broad pale 

 space on the costa in front of the discal spot. Near the outer edge of the 

 wing is a broad dark band. 



In its colors, it affords a good instance of protective mimicry; its tints 

 closely resembling the lichen-covered, peculiar, gray gneiss-rocks on the coast 

 of Labrador. In this respect, it resembles the Anartce, which have the same 

 colors, and can scarcely be distinguished from the lichen-covered rocks on 

 which they settle down after taking flight. 



