Northern Prairie Wildlife Research Center
Wingspan 4.0 cm. Forewing is black with large discal spots and other markings strongly outlined in white, the submarginal line strongly dentate; hindwing is black; populations in wet coastal forests have a white postmedian band, but populations from the high Cascade Mountains east to the Rocky Mountains have a black postmedian band. This noctuid is widely distributed in wet conifer forests of western North America. Moths fly in fall. Caterpillars feed on the foliage of flowering trees and shrubs, particularly huckleberry (Vaccinium).
Similar species: Platypolia loda hindwing is white, widely distributed in dry forests, caterpillars feed on both flowering trees and shrubs and conifers; Xylotype acadia (Noctuidae) forewing is gray with large discal spots, occurs in high elevation conifer forests, caterpillars feed on larch (Larix); species of Papestra (Noctuidae) fly in spring.