562 NORTH AMERICAN BIRDS. 



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

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

 west to eastern Oregon, western Nevada, and Arizona. 



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

 fel 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. Hah. High- 

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

 and southern Arizona. 



734. P. wollweberi (Bonap.). Bridled Titmouse. 

 a^. Head without ci-est. (Subgenus Farus.) 

 6\ Top of head and throat black. 



c\ A white superciliary stripe ; bill very slender. 



Above gray, the wings without distinct lighter edgings ; beneath 

 grayish white medially, brownish gray laterall}^ ; length 5.00- 

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

 plain white, sometimes slightly spotted with reddish brown. 

 Hab. Mountains of western United States. 



738. P. gambeli Eidqw. Mountain Chickadee. 

 c^. No white superciliary streak. 



d}. Sides and flanks brownish gi'ay, 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 .68-.72 (.70). Kab. High- 

 lands of Mexico, north to southern Arizona, 



737. P. meridionalis Scl. Mexican Chickadee, 

 d^. Sides and flanks whitish buffy, or light brownish, always very 

 different in color from back. 

 e\ 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 

 buffy 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-.65 (.61). Eggs .57 X -45. ITab. Eastern 

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

 Indian Territory, and eastern Texas. 



736. P. carolinensis Aud. Carolina Chickadee. 



