Identification: See description at http://pnwmoths.biol.wwu.edu/browse/family-noctuidae/subfamily-oncocnemidinae/sympistis/sympistis-acheron/
Wing Span: 3.0-3.6 cm
Flight: Late summer and fall.
Caterpillar Hosts: Not known
Habitat: Widely distributed in conifer forests of subalpine fir, Douglas fir and ponderosa pine at middle to high elevations in the Rocky Mountains, Cascades, and Siskiyou Mountains.W
Range: Widespread in the mountains of the Pacific Northwest as far north as the southern third of British Columbia. It occurs in the Cascades, Siskiyou Mountains, Blue Mountains, and various ranges in the western Rocky Mountains.