Forewing dull grey green overlaid with hoary grey scales; inner and outer lines black, conversely edged with hoary grey and lunulate-dentate; the outer line sinuate, not indented below middle; stigmata grey edged with black, the two upper separated by the well marked blackish median shade; submarginal line pale, often broken up, indented on the folds, preceded by black wedge-shapedmarks; hindwing fuscous, paler towards base; the whole forewing has a mealy appearance, and in paler examples the markings are often much obscured; — ab.

zetina Stgr., [now full species Haderonia zetina (Staudinger, 1900)] from the Thian-Shan Mts., is described as smaller: the forewings greenish grey, with the markings distinct; a form with the whole forewing uniform grey without markings except the pale reniform, as far as subterminal line, which is conspicuously pale preceded by a dark shade, and with the terminal area beyond quite pale, from Silvaplana, in the Engadine, Switzerland, may be distinguished as ab.

(41 e) the forewing shows the median shade crossing it as a strong blackish band; — in rivalis Guen.

(41 e), the forewing is much varied with yellow scales, the locality given being Mountains near the Sea of Marmora.

In North America the cutworm can be found on fescues in alpine tundra habitat.