BIRDS OF WORTH AND MIDDLE AMERICA. 



451 



Adult fe7nale.— Length (skins), 94.5-111 (102.1); wing, 63-68 (66.2); 

 tail, 33-37.5 (34.7); culmen, 12.5-14.5 (13.S); tarsus, 14.5-16.5 (15.8); 

 middle toe, 11-12 (11.5). « 



Forest districts of northern North America and higher mountains 

 of United States; north to Labrador (Natashguan Point), Keewatin 

 (Repulse Bay, Echimamish, between York Factory and Fort Chui-chill, 

 etc.), Yukon District (Log Cabin, junction of Lewes and Tellj rivers, 

 etc.), and southern Alaska (Skagway); breeding southward to Massa- 

 chusetts (Worcester, Plymouth, and Berkshire counties). New York 

 (Oneida County), Pennsylvania (Sullivan County), northern Indiana 

 (Carroll County), northern Illinois (Ogle County), central Iowa (Jas- 

 per County), and along the higher AUeghenies to western Noi'th Car- 

 olina (where breeding above 5,000 feet); in western United States 

 breeding in spruce forests on higher mountains south to Colorado and 

 the Sierra Nevada, in California; breeding also on Guadalupe Island, 

 Lower California! In winter south to or near the Gulf coast and to 

 New Mexico and Arizona, probably to northern Mexico. 



[/S((ta] canaderms 'Li'S'SMVs, Syst. Nat., ed. 12, i, 1766, 177 (baaed on Sitta cana- 

 densis Brisson, Orn. iii, 593, pi. 29, fig. 4). — Gmemn, Syst. Nat., i, 1788, 

 441.— Latham, Index Orn., i, 1790, 262. 



Silta canadensis BoDDiEHT, Tabl. PI. Enl., 1783. 38 (ex Le Forchepot, du Canada 

 Daubenton, PL Enl. 623, fig. 2).— Bonapaete, Am. Lye, N. Y., ii, 1826, 

 96; Geog. and Comp. List, 1838, 10; Consp. Av., i, 1850, 227.— Nuttall, 

 Man. Orn. U. S. and Can., i, 1832, 583; 2d ed., 1840, i, 697.— Audubon, Orn. 

 Biog., ii, 1834, 24, pi. 105; Synopsis, 1839, 167; Birds Am., oct. ed., iv, 

 1842, 179, pi. 248.— Swainson, Classif. Birds, 1837, 318.— Obnitholoqical 

 Committee, Journ. Ac. Nat. Sci. Phila., vii, 1837, 193 (Columbia E. ). — 

 TowNSEND, Journ. Ac. Nat. Sci. Phila., viii, 1839, 155. — Gambel, Proc. Ac. 

 Nat. Sci. Phila., iii, 1846, 112 (California).— McCall, Proc. Ac. Nat. 

 Sci. Phila., 1851, 215 (Texas).— Cabot, Naumannia, ii. Heft iii, 1852, 66 

 (Lake Superior). — Reichenbach, Handb. Abh., ii, 1853, 152, pi. 513, figs. 



o Sixteen specimens. 



Eastern, Kocky Mountain, and Pacific coast specimens average, respectively, as 

 follows: 



I am unable to appreciate any difference in coloration between specimens from 

 extreme eastern and western or intermediate localities. 



