ADDENDA 537 



763a. /. n. meruloides. Northern Varied Thrush. 



Breeds in Hud. and up. Can. zones from Yukon Delta, Kowak Vail., and 

 Mack. Delta s. to Prince Wm. Sound and s. part of Mack. Vail., and s. 

 in mts. through e. B.C. to nw. Mont, and ne. Ore.; winters mainly in 

 interior of Calif, s. to Los Angeles Co. 



766. Sialia sialis sialis. Bluebird. 



Breeds in Tran. and Up. Aus. zones from se. Canada s. to Fla., Gulf 

 coast, and s. Tex., casually w. to Colo., Wyo., and Mont.; winters most 

 commonly s. of Ohio Vail, and Mid. States. 

 766a. S. s. fulva. Azure Bluebird. 



Breeds mainly in Tran. zone from mts. of s. Ariz. s. to Vera Cruz, 

 Oaxaca, and Jalisco; winters s. to n. Guat. 



767. Sialia mexicana occidentalis. Western Bluebird. 



Breeds mainly in Tran. zone from s. B.C. to w. Mont, and n. Idaho, 

 and s. to San Jacinto Mts., s. Calif.; winters s. to San Pedro Martir Mts., 

 L.C. 

 767a. S. m. bairdi. Chestnut-backed Bluebird. 



Breeds mainly in Tran. zone from Utah, Colo., and w. Tex., s. to Du- 

 rango and Zacatecas; winters from s. Utah and s. Colo. s. to Sonora and 

 Zacatecas. 

 7676. S. m. anabelce. San Pedro Bluebird. 



Breeds mainly in Tran. zone from mts. of n. Calif, and Nev. to San 

 Pedro Martir Mts., L.C. 



768. Sialia currucoides. Mountain Bluebird. 



Breeds mainly in Can. zones from s. Yukon, nw. B.C., cen. Alb., cen. 

 Sask., and sw. Man. s. to w. Neb., mts. of Chihuahua and Ariz., and 

 Sierra Nevada and Cascades; winters from Calif, and Colo. s. to T.ex., 

 Kan., Sonora, and Guadalupe I., L.C.; casual at Gt. Slave Lake. 



BOOKS OF REFERENCE 



(See pp. xliv-xlix.) 



GENERAL WORKS. 



BEEBE, C. W. The Bird. Its Form and Function. Henry Holt & Co., 

 New York. Geographic Variation in Birds with especial reference 

 to Humidity. Sci. Contribs. N.Y. Zool. Soc., vol. i. Sept. 1907. 



CHAPMAN, FRANK M. The Warblers of North America. D. Appleton 

 & Co., New York. 



GRINNELL, GEORGE BIRD. American Game Bird Shooting. Forest and 

 Stream Pub. Co., New York. 



HEADLEY, F. W. The Flight of Birds. Witherby & Co., London. 



HORNADAY, WILLIAM T. The American Natural History. Chas. Scrib- 

 ner's Sons, New York. 



PYCRAFT, W. P. A History of Birds. Zool. Dept., Brit. Mus., 36 Essex 



RIDGWAY ROBERT. Birds of North and Middle America. Parts iii. (1904). 

 iv. (1907), v. (1911), vi. (1914). U.S. Nat. Mus. Color Standards and 

 Color Nomenclature. Pub. by Author. Address U.S. Nat. Mus., Wash- 

 ington, D.C. 



PERIODICALS. 



PACIFIC COAST AVIFAUNA (occasional pubs.). For sale by W. Lee 

 Chambers, Eagle Rock, Los Angeles Co., California. 



PROCEEDINGS OF UNIVERSITY OF CALIFORNIA. Pubs, m Zool., Umv. of 

 Calif., Berkeley, California. 



