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Published online by Cambridge University Press: 31 May 2012
The latest revision of the North American Basilarchia (Gunder, 1934, Can. Ent. LXVI: 39) recognizes three races of archippus Cramer (1779, Pap. Ex. I, t. 16 a, b) i.e. a. archippus inhabiting southern Canada and the Atlantic states as far south as North Carolina and west to Illinois, a. floridensis Strecker (1878, Cat. p. 143) found from South Carolina to the tip of Florida and a. obsoleta Edwards (1882, Fapilio 2: 22) occuring in Arizona, Utah and New Mexico.