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Remarks (Specimens from the Mississippi)

Specimens from the Mississippi Valley, western Pennsylvania, New York, and northern New England average lighter in color and have, as a rule, smaller bills than specimens from the south Atlantic States. They are thus intermediate between ludovicianus and excubitorides, but the differences between them are too slight and inconstant to warrant me in including excubitorides on the basis of specimens which are quite as near ludovicianus as they are to typical examples of the western form.