BIRDS OF KOETH AND MIDDLE AMERICA. 



407 



Eastern Florida (Deep C'reek, near Enterprise). 

 Parus carolinmsis impiger Bangs, Proc. New Engl. Zool. Club, iv, Mar, 16, 1903, 

 1 (Deep Creek, near Lake Ashby, e. Florida; coll. E. A. and 0. Bangs). 



PENTHESTES SCLATERI (Kleinschmidt). 

 MEXICAN CHICKADEE. 



Similar to I'. caroUnens/'s l)ut larj^er and darker, and with the sides 

 and flanks olive-gray. 



Adults in spring ami swin.iiier. — Pileum (including postocular and 

 upper half of loral regions) and hindneck uniform black, with a faint 

 bluish gloss; malar region, chin, throat, and upper chest uniform deep 

 black, very sharply defined posteriorly; sides of head and neck 

 between the two black areas, white; back, scapular, lesser wing-coverts, 

 rump, and upper tail coverts plain deep olive-gray or mouse gray, the 

 rump more strongly tinged with ojive; wings and tail dull slate color 

 with gray edgings, these paler on primaries and (except in worn plum- 

 age) on tertials; sides and flanks (broadly) and under tail-coverts oli\'o- 

 gray (paler and more tinged with olive than back) ; median portion of 

 lower chest, breast, and abdomen, white; bill, black; iris, brown; 

 legs and feet, dusky (bluish gray in life?). 



Adults in autumn and winter. — Similar to the spring and summer 

 plumage, but slightly more strongly tinged with olive, especially on 

 sides and flanks. 



Young. — Similar to adults, but black of head duller, and texture of 

 plumage different. ' , 



Adult mafe.— Length (skins), 111.5-134.5 (120.4); wing, 65-71.6 

 (68.6); tail, 54.5-61.6 (67.9); culmen, 8-10 (9.2); tarsus, 17-19.5 (17.8), 

 middle toe, 9-11 (10.1).« 



Adult female.— Ijength (skins), 108-126.5 (119.6); wing, 64.5-68.6 

 (66.6); tail, 6-i.5-58.5 (56.7); culmen, 9-9.5 (9.3); tarsus, 17-18.5(17.4); 

 middle toe, 9-10.6 (9.8).» 



« Twenty specimens. 

 6 Ten specimens. 



Specimens from central and southern Mexico compare in average measurements 

 with those from northwestern Mexico and southern Arizona, as follows: 



The northern series, perhaps, averages a very little paler and less olivaceous, but 

 the difference seems too slight and inconstant to warrant subspecific separation. 



