156 BULLETIN 50, UNITED STATES NATIONAL MUSECTM. 



A&ult male.-hength (skins), 111-129 (118); wing, 63-73 (67.8); tail, 

 45-54 (50); exposed culmen, 9-11 (9.9); depth of bill at nostrils, 3-4 

 (3.5); tarsus, 16-18 (17.5); middle toe, 9-11 (9.9).« 



Adult female.— -Length (skins), 109-124 (116.6); wing, 62-70 (66.4); 

 tail, 45-52 (48.5); exposed culmen, 9-11 (9.8); depth of bill at nostrils, 

 3.5-4 (3.6); tarsus, 16.5-18.5 (17.5); middle toe, 10-11 (10.3).» 



Western temperate North America; north to British Columbia 

 (Vancouver Island and mainland on both sides of Cascade Range), 

 Alberta (Banff), Athabasca (Slave River, 50 miles below Athabasca 

 Lake) and southwestern Mackenzie (Fort Simpson); east to eastern 

 base of Rocky Mountains; breeding south at least to southern border 

 of United States, in New Mexico and Arizona, and to southern 

 extremity of Lower California (Sierra de la Laguna); in winter south- 

 ward throughout Mexico, to Vera Cruz (Jalapa, etc.) and Oaxaca 

 (Santa Efigenia). 



Vireo gUmis (not Muscicapa gilva Vieillot) Townsend, Journ. Ac. Nat. Sci. Phila., 

 viii, 1839, 153 (Columbia E.).— Woodhouse, in Sitgreaves' Expl. Col. and 

 Zuni, 1853, 76, part (New Mexico).— Henry, Proc. Ac. Nat. Sci. Pliila., 

 1855, 313 (New Mexico); 1859, 106 (do.).— Baied, Eep. Pacific E. E. Surv., 

 ix, 1858, 335, part, 927 (Fort Bridger, Wyoming); Cat. N. Am. Birds, 1859, 

 no. 245, part.— Xanths, Proc. Ac. Nat. Sci. Phila., 1859, 191 (Fort Tejon, Cali- 

 fornia).— Heekmann, Eep. Pacific E. E. Surv., x, pt. iv, 1859, 55 (Califor- 

 nia).— Cooper and Buckley, Eep. Pacific E. E. Surv., xii, pt. ii, 1860, 188 

 (Fort Steilacoom and Puget Sound, Washington).- Butcher, Proc. Ac. Nat. 

 Sci. Phila., 1868, 149 (Laredo, Texas).— Brown, Ibis, 1868, 421 (Vancouver 

 I.).— Cooper, Am. Nat., iii, 1869, 35 (Eocky Mts.).— Allen, Bull. Mus. 



« Fifty specimens. 



6 Thirty-one specimens. 



Specimens from different geographic areas average, respectively, as follows: 



Locality. 



Ten adult males from California 



Ten adult males from San Lucas district, Lower 

 California 



Ten adult males from British Columbia 



Ten adult males from Arizona 



Ten adult males from Colorado, Wyoming, Mon- 

 tana, Utah, etc 



Six adult males ( V. g. brewsteri) from Chihuahua 



Wing. 



Tail. 



Ten adult females from California 



Three adult females from San Lucas district 



Four adult females from British Columbia 



Ten adult females from Arizona 



Four adult females from Colorado) etc 



Three adult females ( V. g. brewsteri) from Chihua- 

 hua 



66.4 



67 



67.6 



71.3 

 73 



66.3 

 64 

 65.6 

 67.5 



71.7 



48.1 

 49.3 

 50.4 



52.8 

 52.5 



47.7 

 46.7 

 47.2 

 49.3 

 50.2 



60.3 



Ex- 

 posed 

 culmen. 



10.6 

 9.9 

 9.7 



Depth 

 of bill 

 at nos- 

 trils. 



10.2 

 9.5 

 9.7 



10 



10.8 



3.3 



3.9 

 3.6 

 3.5 



3.5 



4 



3.5 

 3.5 

 3.5 



Tarsus. 



17.9 



17.7 

 17.2 

 17.2 



17.6 

 17.5 



17.3 

 17.7 

 17.7 

 17.4 

 18 



17.5 



Middle 

 toe. 



10 

 10 



10.1 

 10.2 



10.3 



10 



10.7 



10.1 



10.9 



10.2 



