Four, see text Erebia discoidalis, the red-disked alpine, is a member of the subfamily Satyrinae of family Nymphalidae.

It reaches just into the northern U.S. between Michigan and Montana, and also occurs in Asia, where it has been recorded from the Chukot Peninsula to the eastern Sayan Mountains and Amur.

The habitat consists of large, open, grassy bogs and other areas with acidic soils.

The forewing beneath is marked as above, the border of the brown central area is somewhat broader, the apex and distal margin densely dusted with bluish grey.

Graeser found the species to be very rare at Podrofka in June; from the worn condition of the specimens obtained he concludes that the insect is possibly more plentiful earlier in the year.