BIBDS OF NORTH AND MIDDLE AMERICA. 



289 



121-149 (134.1); culmen, 15.5-19.5 (17.6); tarsus, 24-28.5 (26); 

 middle toe, 26.5-33 (29.6).° 



Young. — Very different in coloration from adults, only the rec- 

 trices, remiges, primary coverts, and alulse being similar; no white 

 bar on nape nor metallic feathers on hindneck; pileum, hindneck, 

 sides of neck, and sides of head brownish gray (quaker drab to mouse 

 gray), much paler on chin and upper throat; smaller wing-coverts 

 margined (more or less distinctly) with paler, as are also feathers of 

 chest; scapulars sometimes suffused with brown. 



Downy young. — Entirely (but rather thinly) covered with rather 

 long down, of deep yellowish buff or chamois color. 



Western United States (in Transition Life-Zone), north to south T 

 western British Columbia (Comox; Howe Sound); Vancouver Island 

 (Parksville, Errington, Union Bay, head of Tahsis Canal, Nootka 

 Sound, and near summit of Mount Arrowsmith; Lulu Island), and 

 Montana, from Pacific coast to Rocky Mountains; east to Montana, 

 western North Dakota (Eaglevale, Ransom County), Colorado, New 

 Mexico, and western Texas (Davis, Chisos, and Guadalupe Mts. ; Fort 



° Twenty-eight specimens. 



Locality. 



Middle 

 toe. 



MALES. 



Four adult males from Washington 



Four adult males from California 



Eight adult males from Arizona 



Five adult males from New Mexico 



Four adult males from western Texas 



Two adult males from Chihuahua 



Five adult males from Sonora 



One adult male from Oaxaca 



One adult male from Chiapas 



Three adult males from Guatemala 



Ten adult males from southern Lower California (=C./. vios- 

 cse) 



FEMALES. 



One adult female from British Columbia 



Two adult females from Washington 



Five adult females from California 



Seven adult females from Arizona 



Six adult females from New Mexico 



One adult female from western Texas 



One adult female from Vera Cruz 



Two adult females from Jalisco 



Two adult females from Chiapas 



One adult female from Guatemala 



Seven adult females from southern Lower California (= C. f. 

 viotcz) 



31.3 



31.6 



29.7 



31.1 



30.4 



28.7 



29.9 



28 



31.5 



30.7 



29.8 



29 

 32.5 



31 

 28.9 



29.6 



28 



30.5 



29.9 



1957°— Bull. 50, pt 7—16 19 



