The forewing has clear spots with other dim markings and the patch at the end of the cell is gray.

[3] Caterpillars of this species are light green with a reddish cast and covered with fine, short hairs.

[4] The Persius Duskywing has a wide range across North America from Alaska to southeastern Manitoba, covering much of the western United States down to Arizona and New Mexico.

[7] Caterpillar hosts include Lupine (Lupinus), golden banner (Thermopsis), Lotus, and other legumes.

Reasons include habitat destruction and alteration, decline of its food plant the wild blue lupine (Lupinus perennis), and pesticide spraying for Spongy Moth (Lymantria dispar).