562 NORTH AMERICAN BIRDS. 
3.00 (2.92), tail 2.40-2.70 (2.58), culmen .40-.48 (.45), tarsus 
.80-.90 (.83). Hab. Rocky Mountain district of United States, 
west to eastern Oregon, western Nevada, and Arizona. 
733a. P. inornatus griseus Ripcw. 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 (Bonar.). Bridled Titmouse. 
a. Head without crest. (Subgenus Parus.) 
b. 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 laterally; length 5.00- 
5.75, wing 2.70-3.00, tail 2.40-2.60. Eggs .63 xX .48, usually (?) 
plain white, sometimes slightly spotted with reddish brown. 
Hab. Mountains of western United States. 
738. P. gambeli Rroaw. Mountain Chickadee. 
c. No white superciliary streak. 
@, 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 .68-.72 (.70). Hab. High- 
lands of Mexico, north to southern Arizona. 
737. P. meridionalis Sct. Mexican Chickadee. 
@. 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 
4,254.60, wing 2.40-2.60 (2.47), tail 2.10-2.50 (2.19), 
tarsus .55-.65 (61). Eggs 57 x 45. Hab. Eastern 
United States, chiefly south of 40°, west to Missouri, 
Ind/an Territory, and eastern Texas. 
(94.) 736. P. carolinensis Aup. Carolina Chickadee. 
