PROCEEDINGS 
OF THE 
UNITED STATES NATIONAL MUSEUM. 
isso. 
REVISIONS OF NOWENCLATURE 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 birds— 
Coues’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 suffi- 
ciently distinguished by the absence of the concordant number following: 
each name, in the revised list following this paper. 
a. SPECIES GIVEN IN CouUES’s CHECK LIST. 
46. Turdus AONALASCHKAE, t 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 Aoona- 
lashka Thrush of Latham (Synopsis, I, 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, Anct.,. 
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, Z. 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.) 
tCatalogue of North American Birds contained chiefly in the Museum of the Smith- 
gonian Institution. By Spencer F. Baird. [First octavo edition.] Washington: 
Smithsonian Institution. 1859. [‘‘Smithsonian Miscellaneous Collections,.108.” Net 
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, i880. 
