May, 1921] 'A Revision of- Dendroica 241 



and east to central eastern California, central Oregon, central 

 Washington, and central British Columbia. Winters from 

 southern British Columbia, south through California and 

 Arizona, to the States of Guanajuato and Michoacan, Mexico. 

 In migration it occurs casually east to Wyoming and New 

 Mexico. 



Remarks. The type of Townsend's Sylvia aiiduboni was 

 an adult male obtained by him on the Columbia River near 

 Fort Vancouver, and is now in the United States National 

 Museum. It proves to belong to the smallest race of the 

 species, so that the specific name aiiduboni applies without 

 doubt to the breeding bird of the Pacific coast region of the 

 United States. This subspecies reaches its minimum size in 

 Washington and British Columbia. Average wing measure- 

 ments of adult males from different localities compare as 

 follows: Washington and British Columbia, 74.9 mm.; Cali- 

 fornia, 76.6 mm. Individuals from central Oregon and from 

 California (excepting the southeastern portion of the state) 

 are somewhat intermediate between typical Dendroica aiidubo7ii 

 auduboni and the Rocky Mountain race, but are evidently 

 nearer the present form. 



The 116 specimens examined came from the following 

 localities : 



British Columbia. — Comox (May 31, 1895; June 1 and 8, 

 1895); Stuart Lake (June 4, 1889; eggs and nest); Wellington 

 (May 25, 1895) ; Agassiz (Dec. 7, 1895). 



Arizona.— Fort Verde (Jan. 23, 1888; Dec. 30, 1887); 

 Apache (Oct. 26 and 29, 1874) ; Cochise (May 5, 1902) ; Tucson 

 (Jan. 29, 1884). 



Califorfiia. — San Francisco (Oct. 29, 1895) ; San Bernardino 

 (Jan. 5, 1886); Red Bluff (Dec. 22, 1883; May 6, 1884; April 7 

 and 25, 1884; March 29, 1884); Warner Mountains (Aug. 9, 

 1878); Poway (Feb. 24, 1888); Nevada (October, 1872) 

 Berryessa, Santa Clara Co. (Jan. 20, 1889; April 4, 1890) 

 Santa Clara County (Oct. 5, 1896) ; Lassen Peak (Aug. 26, 1898) 

 Chico (Dec. 21, 1905; Jan. 5, 1906); Burney (June 9, 1906) 

 South Yolla Bolly Mountain (July 29, 1905); Oro Grande 

 (March 18, 1905); San Diego (Oct. 9, 1893); Riverside (Jan. 2, 

 1889); Carberry's Ranch (May 20, 1894); Strange Camp, 

 5800 feet, San Gabriel Mountains (July 16, 1905); Preston 



