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PROCEEDINGS

OF THE

UNITED STATES NATIONAL MUSEUM.

1880.

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REVISIONS OF NOMENCLATURE OF CERTAIN NORTH AMERICAN BIRDS.

By ROBERT RIDGWAY.

The following emendations of nomenclature apply both to species enumerated in the latest published list of North American birdsCoues's "Check List,"* and others not contained therein. These two series are therefore included in separate categories, the former having, for convenience of reference, the corresponding number of the "Check List" prefixed to each name.

It is deemed inexpedient to give here a list of the species to be added to the Smithsonian Catalogue of 1859,† for the reason that they are sufficiently distinguished by the absence of the concordant number following each name, in the revised list following this paper.

a. SPECIES GIVEN IN COUES'S CHECK LIST.

4b. Turdus AONALASCHKAE, ‡ Gmel.-In my report on the ornithology of the fortieth parallel expedition I used the name "guttata, Pallas," as the earliest name certainly applicable to this species; but I now believe that Gmelin's name, Turdus aonalaschkae, based upon the Unalascha Thrush of Pennant (Arctic Zoology, II, p. 338) and Aoonalashka Thrush of Latham (Synopsis, II, i, p. 23), is the one which should be used. As in the case of Muscicapa guttata, Pall., there can be no doubt whatever that the western Dwarf Thrush (Turdus nanus, Auct., nec Aud.!) is the very species which these authors described under the above names. Turdus aonalaschkae being, therefore, the proper name for the Hermit Thrushes collectively, the Middle and Eastern Province forms should be called, respectively, T. aonalaschkae auduboni and T. aonalaschkae pallasi.. With regard to the last, it is very evident that

* A Check List of North American Birds. By Elliot Cones. Salem. Naturalists' Agency. 1873. 8vo, pp. 137. (635 species.)

+ Catalogue of North American Birds contained chiefly in the Museum of the Smithgonian Institution. By Spencer F. Baird. [First octavo edition.] Washington: Smithsonian Institution. 1859. ["Smithsonian Miscellaneous Collections, 108." Not paged; 738 species, including varieties, all consecutively numbered.]

+ Small capitals indicate the name which is changed or emended.

Proc. Nat. Mus. 80-1

March 27, 1880.

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