The combination Castnia psittacus (Molina) designated by Philippi (1867) and later argued by Ureta (1955) is invalidated by deficiencies, inconsistencies, misrepresentations and misinterpretations of the description made by Molina. Castnia eudesmia Gray stat. rev. is proposed as the valid combination, while the epithet “psittacus” is assigned to the only Papilionidae of Chile Battus polydamas.
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