Drasteria adumbrata, the Shadowy Arches, is a moth of the Erebidae family. It is found from coast to coast in southern Canada, south in the west to California and Colorado, south in the east to New England and Michigan. Subspecies alleni is found from eastern Alberta to New York and Nova Scotia. Subspecies saxea occurs from southern British Columbia and south-west Alberta south to California and Colorado. The wingspan is about 32 mm. Adults are on wing in summer.