1918 | Grinnell: The Subspecies of the Mountain Chickadee 515 
LITERATURE CITED 
AMERICAN ORNITHOLOGISTS’ UNION COMMITTEE. 
1886. The code of nomenclature and check-list of North American birds 
adopted by the American Ornithologists’ Union. (New York, Amer- 
ican Ornithologists’ Union), viii + 392 pp. 
1910. Check-list of North American birds. Ed. 3, revised (New York, Amer- 
ican Ornithologists’ Union), 430 pp., 2 maps. 
Bairp, 8. F. (‘with the co-operation of’’ Cassin, J., and LAWRENCE, G. N.) 
1858. Birds. Pacific Railroad Reports, 9, lvi + 1005 pp. 
BirtWELL, F. J. 
1901. Description of a supposed new subspecies of Parus from New Mexico. 
Auk, 18, pp. 165-167. 
GAMBEL, W. 
1843. Descriptions of some new and rare birds of the Rocky Mountains and 
California. Proc. Acad. Nat. Sci. Phila., 1, pp. 258-262. 
GRINNELL, J. 
1908. The southern California chickadee. Condor, 10, pp. 29-30. 
Ripeway, R. 
1901. The birds of North and Middle America. U.S. Nation. Mus. Bull., 50, 
part I, xxx + 715 pp., 20 pls. 
1904, Jbid., part III, xx + 801 pp., 19 pls. 
1912. Color standards and color nomenclature. (Washington, D. C., Ridg-° 
way), ii + 44 pp., 53 pls. 
Transmitted March 3, 1918. 
