_Butterfly._--Closely resembling _A. eurynome_ and _A. artonis_. Like _artonis_, the spots on the under side of the wing are without silver. The female very closely resembles the female of _artonis_, and in fact I am unable to distinguish the types of the females of the two species by any marks which seem to be satisfactory. Expanse, ♂, 1.75 inch; ♀, 1.75-1.90 inch.
This species, which is as yet comparatively rare in collections, is found in Montana and the province of Alberta, in British America, at a considerable elevation.
(43) =Argynnis opis=, Plate XIV, Fig. 8, ♂, _under side_ (Opis).
_Butterfly._--This species, which apparently belongs to the Eurynome-group, appears by the location of its markings to be closely related to _eurynome_, but on the upper side the wings of both the male and female are more heavily obscured with fuscous at the base; the dark markings are heavier than in _eurynome_, and in both sexes it is smaller in size, being the smallest of all the species of the genus thus far found in North America. The spots on the under side of the wings are none of them silvered. Expanse, ♂, 1.50 inch; ♀, 1.60 inch.
_Early Stages._--Nothing is known of these.
The types came from Bald Mountain, in the Caribou mining district of British Columbia.
(44) =Argynnis bischoffi=, Edwards, Plate XI, Fig. 7, ♂ (Bischoff's Fritillary).
_Butterfly_, ♂.--The fore wings on the upper side are bright reddish-fulvous, the base of the primaries and the inner half of the secondaries being heavily obscured by blackish, so as to conceal the markings. Both wings have moderately heavy black marginal borders. The other markings are as in _A. eurynome_. On the under side the fore wings are buff, laved with reddish at the base. The hind wings are pale buff, with the basal and discal areas mottled with green. The marginal belt is clear buff. In some specimens the spots on the under side are not silvered; in others they are well silvered.
♀.--The female on the upper side is very pale buff, slightly laved with fulvous on the outer margin of both wings. All the markings are heavy; the margins of both wings are solid black, the spots within the lunules being pale and almost white. The fore wings at the base and the inner half of the hind wings are almost solid black. On the under side the wings are very much as in the male, and the same variation as to the silvering of the spots is found. Expanse, ♂, 1.80 inch; ♀, 1.90 inch.