Northern Prairie Wildlife Research Center
Wingspan 3.7 cm. Forewing is dark black-gray with a pale gray orbicular spot. This noctuid is abundant and widely distributed in higher elevation conifer forests. Moths fly in early to midsummer. Caterpillars feed on the foliage of alder (Alnus).
Similar species: Lasionycta mutilata forewing is pale gray with a very large reniform spot outlined in black, occurs in subalpine forests of the high Cascade Mountains; Lasionycta wyatti is larger, forewing is white with large discal spots, endemic to coastal sand dunes. Also, many similar species occur in alpine habitats.