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Published online by Cambridge University Press: 31 May 2012
Study of the series placed in the Canadian National Collection as Nymphula badiusalis (Walker) revealed that it consisted of specimens of two closely similar species. The original descriptions are sufficiently detailed to indicate that one of these is N. badiusalis and that the other is N. curviferalis (Walker), which has been considered a synonym of N. badiusalis. The following brief descriptions will permit separation of the species.