74 



lIojM'dale, Indian TIaihor, Ilcnlcy Harbor, and Caribou Island, Straits 

 of Belle Isle, August (Paekard). 



This is a truly aretic speeies, being found in Greenland and Lajsland, and 

 the eolder, exposed,, treeless portions of tlie Labrador eoast. It has not jet 

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

 or in the Europi-'an Alps. 



This arctic species difiers 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 Tal)le Island, in Henhy IIarl)or, which is 

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

 with (heir peculiar vacillating tlight, like feathers, on the ground. There was 

 considerable varial ion among them. Some were more dusky than others, with a 

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

 •became reduced to mere points on the inner edge, v/Ith 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 l)road, du.sky, submarginal band. 

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

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

 dots are brought 6ui in very clear relief, as in Lefebvre's var. BruUcl. The 

 si2e of the dusky spots on the fringe varies greatly. 



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

 lines than usual. The base of the fore wings is black; beyoiul is a broad 

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

 ol" isolated scpiare sp!)ts, willi a large, discal, double patch, and a broad [)ale 

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

 wing is a broad dark l)and. 



In its c()l(»rs, it affords a good instance of protective mimicry; its tints 

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

 of J^abrador. In this respect, it resembles the Anartce, which have the same 

 colors, and can scarcely l)c distinguished from the liclien-covcrcd rocl\S or 

 which th(!y settle down after taking flight. ' 



