About Drasteria adumbrata Behr, 1870
Drasteria adumbrata, commonly known as the shadowy arches, is a moth species belonging to the family Erebidae. This species was first formally described by Hans Hermann Behr in 1870. It occurs across southern Canada from coast to coast; in the western portion of its range, it extends south to California and Colorado, while in the eastern portion it extends south to New England and Michigan. Two subspecies are recognized: D. a. alleni, which is found from eastern Alberta to New York and Nova Scotia, and D. a. saxea, which occurs from southern British Columbia and southwestern Alberta south to California and Colorado. The wingspan of adult Drasteria adumbrata is approximately 32 millimeters. Adult moths are active in flight during the summer. The larvae of this species feed on Vaccinium angustifolium, and likely feed on other species in the Vaccinium genus as well. Feeding on Arctostaphylos uva-ursi has also been recorded for this species.
