(1) Erebia discoidalis Kirby, [Plate LXVI], Fig. 1, ♂ (The Red-streaked Alpine).
Easily distinguished from all other species in our fauna by the plain dark wings streaked on the costa and suffused over the outer three fourths of the middle of the fore wings with dark red or maroon. Expanse 1.75-2.00 inches.
Habitat region of Hudson Bay, thence westward to Alaska and southward among snowy peaks of British Columbia. Probably found on high mountains of Idaho and Montana.
(2) Erebia epipsodea Butler, [Plate LXVI], Fig. 2, ♂ (The Common Alpine).
The upper side is shown in our cut; the under side repeats the markings of the upper side more or less clearly, and besides has on the hind wing a broad, curved, median, blackish band. Expanse 1.75-2.10 inches.
Ranges from the alpine summits of New Mexico northward at suitable elevations to Alaska, where it is common.
Genus GYROCHEILUS Butler
(The Blackamoors).
PL. LXVII
Medium-sized butterflies, very dark in color, with eye-spots on fore wings, and hind wings bordered with brown. There is only one species found in our region, and a detailed account of its structure may therefore be spared.