Northern Prairie Wildlife Research Center
Wingspan 4.8 cm. Forewing is pale gray with a submarginal line of small black spots; hindwing is dark gray. This noctuid is common and widely distributed in western North America. Moths fly in fall and into spring. Caterpillars feed on the foliage of flowering trees and shrubs such as maple (Acer), alder (Alnus), dogwood (Cornus), hawthorn (Crataegus), ash (Fraxinus), cherry (Prunus), currant (Ribes), rose (Rosa), and willow (Salix).
Similar species: Lithophane pertorrida forewing is dark gray with a contrasting white orbicular spot, widely distributed, caterpillars feed on the foliage of flowering trees and shrubs; Lithophane contenta is smaller, forewing gray and without black submarginal spots; Lithomoia solidaginis (Noctuidae) forewing is gray with a large white reniform spot and black submarginal dashes, occurs in high elevation conifer forests, caterpillars feed on the foliage of huckleberry (Vaccinium).