Northern Prairie Wildlife Research Center
Wingspan 4.4 cm. Forewing is gray and heavily suffused with black; male hindwing white, female hindwing gray. This noctuid is common and widely distributed in dry forests. Moths fly in late spring and early summer. Caterpillars feed on the foliage of snowbrush (Ceanothus velutinus), buckbrush (Ceanothus cuneatus), and bitterbrush (Purshia tridentata).
Similar species: Acronicta thoracica forewing pale gray with fine black streaking, hindwing white, widely distributed in the Rocky Mountain region.