BIRDS OF NORTH AND MIDDLE AMERICA. 



45 



Adtdt male. — Length (skins), 146-167 (157); wing, 90-97 (92.8); 

 tail, 68-74.5 (71.8); exposed culmen, 12-14.5 (13.5); tarsus, 26.5-30 

 (28.4); middle toe, 15-17 (16.6).« 



AduU female.— Lejigi\\ (skins), 143-169 (159); wing, 86-94 (90.1); 

 tail, 64-70 (67.7); exposed culmen, 13-14 (13.5); tarsus, 28-30 (28.6); 

 middle toe, 16.5-18 (16.8).'' 



Breeding in Sierra Nevada and Cascade ranges and northward, from 

 Mount Whitney, southern California, to Northwest Territory (Yukon 

 Kiver); during migration southward to Lower California (Casa Pin- 

 tada, February), Sonora (Alamos, February), Chihuahua (Sierra 

 Madre, October), Coahuila (Sierra Guadalupe, April), Nuevo Leon 

 (Monterey, February 19 to May 1; Rodriguez, January), Tamaulipas 

 (Soto la Maria, March; Linares, March; Victoria, March; Hidalgo, 

 March) , and western Texas (Frontera, May 8 ; Fort Clark, December ; 

 Langtry, April), eastward to Wyoming (Fort Bridger, May 19 to 24). 



Turdus silens (not of Vieillot) Baird, Kep. Pacific R. H. Surv., ix, 1858, 922 



part (Fort Bridger, Wyoming). 

 T[urdus] swainsoni ustulatus Ridgway, Bull. Essex Inst., vi, 1874, 172 (w. slope 



Sierra Nevada, 5,000 ft., July). 

 Turdus ustulatus (not of Nuttall) Ridgway, Orn. 40th Parallel, 1877, 334, in text, 



395 (excl. synonymy and spec. no. 779). 

 Turdus sequoiensis Belding, Proc. Cal. Ac. Sci., 2d ser., ii, June 11, 1889, not 



paged (Big Trees, Calaveras Co., California; coll. Calif. Ac. Sci.). 

 Hylocichla aonalaschkse sequoiensis Fishe r ( W. K.) , Condor, ii, Dec. , 1900, 138 (Mount 



St. Helena, Napa Co., California). — Barlow, Condor, iii, 1901, 184 (Sierra 



Nevada; song; descr. nests). — Grinnell (J.), Pacific Coast Avifauna, no. 3, 



1902, 74.— Ray, Auk, xx, 1903, 192 (Lake Valley, California, in mountains; 



song, etc.). 

 Turdus aonalaschkai (not of Gmelin) American Ornithologists' Union Check, 



List, 1886, no. 759, part. 

 T[urdus] aonalaschkse Ridgway, Man. N. Am. Birds, 1887, 576, part. 



a Twenty specimens. 



b Ten specimens. 



Average mej-surements of specimens from different geographic areas are as follows: 



