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While collecting ornithological specimens from October, 1948 to August, 1949 in the territory of Quintana Roo, on some of the islands off the east coast of the peninsula, and for a short while in the state of Yucatan, a number of wintering and migrating North American species were taken. Some of these specimens constitute new, or rare, records for the peninsula and cast additional light on the winter range and migration routes of common North American birds. The specimens referred to hereinafter are incorporated in the collections of the Peabody Museum. A comprehensive report on my Yucatan Peninsula collection is in preparation.