562 NORTH AMERICAN BIRDS. 



3.00 (2.92), tail 2.40-2.70 (2.58), culmen .40-.48 (.45), tarsus 

 .80-.90 (.83). Hab. Eocky Mountain district of United States, 

 west to eastern Oregon, western Nevada, and Arizona. 



733a. P. inornatus griseus EIDGW. Gray Titmouse. 

 b*. Throat black in adult, dull grayish in young. 



Adult : Top of head, including crest, black, the crown gray ; a streak 

 behind eye, connecting posteriorly with a vertical bar or crescent 

 behind ear-coverts, collar round hind-neck, and patch covering chin 

 and throat, black; rest of head grayish white; upper parts plain 

 grayish, lower parts white medially, grayish laterally. Young 

 with chin blackish, but throat dull grayish, and other markings of 

 head less sharply defined. Length 4.50-5.00, wing 2.60-2.80, tail 

 2.40-2.65. Eggs 5-7, about .66 X .52, plain white. Hab. High- 

 lands of Mexico, north to western Texas, southern New Mexico, 

 and southern Arizona. 



734. P. wollweberi (BoxAP.). Bridled Titmouse, 

 a*. Head without crest. (Subgenus Parus.) 

 ft 1 . Top of head and throat black. 



c 1 . A white superciliary stripe ; bill very slender. 



Above gray, the wings without distinct lighter edgings ; beneath 

 grayish white medially, brownish gray laterally ; length 5.00- 

 5.75, wing 2.70-3.00, tail 2.40-2.60. Eggs .63 X -48, usually (?) 

 plain white, sometimes slightly spotted with reddish brown. 

 Hob. Mountains of western United States. 



738. P. gambeli EIDGW. Mountain Chickadee. 

 c 2 . No white superciliary streak. 



cP. Sides and flanks brownish gray, not very different in color from 

 back. 



Sides of head and median lower parts white ; wings without 

 distinct whitish edgings ; length 4.70-5.20, wing 2.60-2.80 

 (2.64), tail 2.25-2.40 (2.32), tarsus .6S-.72 (.70). Hab. High- 

 lands of Mexico, north to southern Arizona. 



737. P. meridionalis SCL. Mexican Chickadee, 

 d*. Sides and flanks whitish bufly, or light brownish, always very 



different in color from back. 



e 1 . Wing .20, or more, longer than tail ; tertials and greater wing- 

 coverts without distinct whitish edgings ; black of throat 

 with an abruptly defined posterior border. 

 Above uniform grayish ; beneath white medially, light 

 bufly brownish laterally (paler in summer) ; length 

 4.25-4.60, wing 2.40-2.60 (2.47), tail 2.10-2.50 (2.19), 

 tarsus .55-.6S (.61). Eggs .57 X -45. Hab. Eastern 

 United States, chiefly south of 40, west to Missouri, 

 Indian Territory, and eastern Texas. 



736. P. carolinensis Am. Carolina Chickadee. 



