Erynnis afranius, also known as the afranius duskywing or bald duskywing, is a species of butterfly of the family Hesperiidae. It is found from northern Mexico through the central United States to southern Canada in the provinces of Alberta, Saskatchewan and Manitoba.[1]
The wingspan is 25–31 mm. There can be two generations from mid-May to late August.[1]
The larvae feed on Lupinus species, Lotus species and Thermopsis rhombifolia.[2]