Polar Fritillary

Brenthis polaris

Butterfly.--The upper side dull fulvous; the markings on the inner half of the wings are confluent, and lost in the brownish vestiture which obscures this portion of the wing. The outer median area is defined by irregular zigzag spots which flow together. Beyond these the submarginal row of small black spots stands out distinctly upon the lighter ground-color of the wings. The outer margin is marked by black spots at the end of the nervules, on the fore wings somewhat widely separated, on the hind wings narrowly separated by the lighter ground-color. On the under side the wings are fulvous, with a marginal row of white checkerings on both wings. The hind wing is deeply mottled with ferruginous, on which the lighter white markings stand forth very conspicuously. Expanse, male, 1.50 inch; female, 1.50-2.00 inches.

Early Stages.--Unknown.

This butterfly has been found in Labrador, Greenland, and other portions of arctic America, as far north as latitude 810 52'.