Note 107 — Family COLUMBIDÆ.—The Pigeons.

Zenaidura yucatanensis, Lawr. Ann. N. Y. IX, 1869. This bird is so exactly intermediate between the Z. carolinensis and Zenaida amabilis, as to lead us to strongly suspect it is a hybrid between the two. With the Z. carolinensis it agrees only in possessing fourteen tail-feathers; the coloration and size and shape of the bill being exactly those of Z. amabilis, while the tail-feathers are intermediate in length and shape between those of the two species. The colors differ from those of Z. amabilis only in being of a just appreciably lighter shade, there being the same broad white tip to the secondaries, brilliant steel-blue sub-auricular spot, and deep reddish crissum, characterizing the Z. amabilis, as distinguished from Z. carolinensis.