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Psyche 1:57-58, 1874.

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EDITED BY B. PICKMAN MANN.
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Vol, I.] Cambridge, Mass., April, 1875. [No. 12. A North Greenland Butterfly.
The recent polar expedition of Captain Hall, in the U. S. Steamer Polaris, bought home from Polaris Bay, Lat. 81' 38' N., two specimens, male and female, of BrentMs polaris (Boisd.) - the most northern butterfly known.
The male is badly rubbed, but evidently differs, as the fresher female does, from Labrador specimens, in being of a much duller -
color upon both surfaces of the wings.
The upper surface of
the male, in Labrador specimens, is bright orange fulvous, that of the females a little duller; while in these Greenland exam- ples the color is a dull sordid fulvous, almost changing to ashen in the fore-wings of the female. The dark markings of the upper surface in both sexes are not so dark in the Greenland as in the Labrador specimens, and, with some exceptions, they are also slightly narrower ; the transverse markings in the cell of the fore wings in both sexes are noticeably slenderer, but the mesial band of the fore wings, besides being less irregularly zigzag, is broad- ened in the posterior half of the wing, at least in the female, and its border more obscured by scattered griseous scales ; the mesial -
band of the hind wing is, however, narrower than in Labrador specimens, and there is therefore a greater extent of fulvous surface, but that is greatly obscured by griseous scales; the roundish spots of the extra-mesial row are rather larger than usual in the female.
Beneath, similar differences occur.
The general color is
duller than on the upper surface, though not to so great an ex- tent, and the contrasts of the dark and bright markings are not so noticeable as in Labrador specimens. On the fore wings, the lower portion of the mesial band is broader, as on the upper surface, and the extra-mesial spots are also larger, especially



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