Northern Prairie Wildlife Research Center
Wingspan 3.5 cm. Forewing is black with contrasting white basal and submarginal areas and a large white, bifurcate stigma; hindwing is pale brown with a broad black submarginal border. This noctuid is common and occurs in wet conifer forests of the Pacific Northwest and northern Rocky Mountains, and is common in wet coastal forests. Moths fly in midsummer. Caterpillars feed on the foliage of species of Pinaceae.
Similar species: Syngrapha alias forewing is mottled pink-gray with a bifurcate stigma, widespread in both Sitka spruce and high elevation Engelmann spruce forests, caterpillars feed on the foliage of conifers.