Erynnis pacuvius

Erynnis pacuvius, also known as Pacuvius duskywing, Dyar's duskywing or buckthorn dusky wing, is a species of skipper butterfly in the family Hesperiidae. It is found in southern British Columbia and in most of the western United States.^[1]

Pacuvius duskywing
Scientific classification
Kingdom:	Animalia
Phylum:	Arthropoda
Class:	Insecta
Order:	Lepidoptera
Family:	Hesperiidae
Genus:	Erynnis
Species:	E. pacuvius
Binomial name
Erynnis pacuvius (Lintner, 1878)
Synonyms
Nisoniades pacuvius Lintner, 1878 Thanaos pacuvius Godman & Salvin, [1899]

The wingspan is 29–33 mm. The flight period is between June and July in the north with a second generation in the south.^[1]

The larvae feed on Ceanothus species.^[2]