Barrens dagger moth has a fragmented distribution that includes southern Ontario and Manitoba, New York, New Jersey, Massachusetts, North Carolina, Virginia, Georgia, Oklahoma, Missouri, Arkansas, and Colorado [1,9,10,11,14]. It may be extirpated from Ohio, Pennsylvania, Connecticut, mainland New York, and New Mexico [10,14,15,16]. It has been suggested that populations in the southwestern United States may be a separate species [10,14]. No maps of barrens dagger moth distribution were available as of 2008.
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