- BND: Afranius Dusky Wing; Erynnis afranius (Lintner, 1878)
- BNA: Afranius Duskywing; Erynnis afranius
- NDC: ERAF
- Habitat: Aspen woodlands; widespread in western counties
- Larval food: Thermopsis rhombifolia, probably other legumes
- Adult flight: Two broods, in May and July
- References: Royer 19, Ferris & Brown 79, Scott 493
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