Underside is brown or gray with dull spots that are often obscure. Male has a costal fold enclosing scent scales on the forewing. Females lay eggs singly on the host plant.
Caterpillars make a webbed leaf nest in which they live and feed.
One brood from April-July. South in the mountains from British Columbia and Alberta to southern California, Arizona, and New Mexico. G4 - Apparently secure globally, though it might be quite rare in parts of its range, especially at the periphery. Biological Survey and Analysis prepared for the Forest Service, United States Department of Agriculture. Scott, J. A. 1986.