Northern Prairie Wildlife Research Center
Wingspan 4.4 cm. Forewing is red-brown with large discal spots, postmedian band is lavender to purple, submarginal line is sharply dentate and extends to the wing margin. This noctuid is common and widely distributed in dry forests in western North America. Moths fly in early to midsummer. Caterpillars feed on grasses.
Similar species: at least 10 species of Apamea have similar red-brown wings; Apamea atriclava forewing with a brown postmedian band, common in wet coastal forests; Apamea auranticolor is smaller, forewing with obscure markings, occurs in dry forests; Apamea vultuosa forewing pale brown with a black costal margin and black submarginal dashes, occurs in wet conifer forests; Apamea alia forewing is pink-orange with obscure markings.