1920] 



Swarth: Revision of Avian Genus Pmserella 



119 



to the San Francisco Bay region. The one specimen from the Sierra 

 Nevada of Plumas County, taken September 27, was probably a 

 migrant on its way farther south. 



It is noteworthy that nearly all the California examples of iliaca 

 were secured by collectors who had gathered specimens for j^ears at 

 the several points where these birds were taken, hence the small 

 number of specimens of this race, compared with those of most of 

 the other wintering subspecies of Passerella, may be taken as fairly 

 indicative of the relative numbers of each actually present. 



Fig. L. Bills of the tAvo subspecies of fox sparrow of the Iliaca group ; natural 

 size. 



a. Passerella iliaca iliaca, adult male; no. 6088, Mus. Vert. Zool. ; Eastford, 

 Connecticut; April 12, 1876. 



b. FasserelUi iliaca altivagans, adult male; no. 26039, Mus. Vert. Zool.; Aspen 

 Valley, Yosemite National Park, California; October 14, 1915. 



Besides the specimens here listed there are others recorded from 

 California that I have not seen, as follows: "Accidental in California 

 (spec, in Mus. S. I.)" (Cones, 1874, p. 161) ; specimen from Poway, 

 San Diego County, January 3, 1888 (W. E. Bryant, 1889, p. 90) ; 

 specimen from Oakland, December 2, 1892 (W. E. Bryant, 1893, 

 p. 363) ; Saticoy, December 14, 1872 (Baird, Brewer and Ridgway, 

 1874, p. 516). 



Passerella iliaca altivagans Riley 

 Alberta Fox Sparrow 

 Original description. — Passerella iliaca altivagans Riley, 1911, p. 234. 



Ti/pe specimen. — No. 222832, U. S. Nat. Mus. ; male, immature ; 

 Moose Branch of Smoky River (about 7000 feet altitude), Alberta; 

 July 31, 1911; collected by J. H. Riley (original number, 2175). 



Range. — In summer known only from a few points in the interior 

 of British Columbia and the adjacent part of Alberta (see map, 

 fig. N). In winter southward at least to extreme southern California. 



