Literature Cited 



Aldbich, J. W. 



1963. Geographic orientation of American Tetraonidae. Journ. Wildl. 



Mgmt., vol. 27, pp. 528-545. 

 American Ornithologists' Union 



1902. Eleventh supplement to the American Ornithologists' Union Check- 

 list of North American Birds, pp. 315-342. 

 1957. Check-list of North American Birds, 5th ed., 691 pp. Baltimore, 

 Md. : The Lord Baltimore Press, Inc. 

 Audubon, J. J. 



1838. Birds of America, 4 vols., 435 pis. Elephant folio. London. 



1839. Ornithological biography, vol. 5, 664 pp. Edinburgh. 

 Bangs, O., and Penard, T. E. 



1921. The name of the eastern hermit thrush. Auk, vol. 38, pp. 432-434. 

 Banks, R. C. 



1964. Geographic variation in the white-crowned sparrow, Zonotrichia 



leucophrys. Univ. California Publ. Zool., vol. 70, pp. 1-123. 

 1967. Birds and mammals of La Laguna, Baja California. Trans. San 

 Diego Soc. Nat. Hist., vol. 14, pp. 205-232. 

 Behle, W. H. 



1942. Distribution and variation of the horned larks (Otocoris alpestris) of 

 western North America. Univ. California Publ. Zool., vol. 46, pp. 

 205-316. 

 Bent, A. C. 



1949. Life histories of North American thrushes, kinglets and their allies. 

 United States Nat. Mus. Bull. 196, pp. 1-454. 

 Bishop, L. B. 



1933. Two apparently unrecognized races of North American birds. Proc. 

 Biol. Soc. Washington, vol. 46, pp. 201-203. 

 Bowers, D. E. 



1960. Correlation of variation in the wrentit with environmental gradients. 

 Condor, vol. 62, pp. 91-120. 

 Brewster, W. 



1902. Birds of the Cape Region of Lower California. Bull. Mus. Comp. 

 Zool., vol. 41, pp. 1-241. 

 Brooks, A., and Swarth, H. S. 



1925. A distributional list of the birds of British Columbia. Pacific Coast 

 Avif., vol. 17, pp. 1-129. 

 Burleigh, T. D., and Peters, H. S. 



1948. Geographic variation in Newfoundland birds. Proc. Biol. Soc. 

 Washington, vol. 61, pp. 111-126. 

 Cumming, R. A. 



1933. Descriptions of a proposed new race of song sparrow and of a hermit 

 thrush. Murrelet, vol. 14, pp. 78-79. 

 Davis, J. 



1951. Distribution and variation of the brown towhees. Univ. California 

 Publ. Zool., vol. 52, pp. 1-120. 



30 



