Erynnis lucilius
Erynnis lucilius, the columbine duskywing, is a butterfly of the family Hesperiidae. It is found in North America from southern Quebec to Manitoba and south to the northeastern United States.
The wingspan is 21–29 mm. There are two generations in the east from early May to mid-June.
The larvae feed on Aquilegia canadensis. They also sometimes feed on sometimes Aquilegia vulgaris.
The species is listed as endangered in the Connecticut by state authorities.
