542 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



veiy rarely barred with dusky brown; maxilla horn color or dusky, 

 usually darker terminally; mandible pale horn color; iris brown; legs 

 and feet brownish (in dried skins). 



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

 plumage, but averaging decidedly brighter in color, the upper parts 

 more decidedly rufescent (almost chestnut), triangular white marks at 

 tip of middle and greater wing-coverts more distinct, superciliary 

 stripe more buffy (sometimes decidedly butf), and under parts (except 

 chin and throat) more strongly buffy, approaching tawny-buff or clay 

 color on sides and flanks, the latter sometimes tinged with chestnut. 



.Young. — Very similar in coloration to spring and summer adults, 

 but texture of plumage much looser; feathers of pileum indistinctly 

 paler medially, and, sometimes, feathers of chest with indistinct dusky 

 margins. 



Adult male.— Length (skins), 119-14:^ (180.5); wing, .54.5-64 (HU.4); 

 tail, 45.5-55.5 (50.6); expo.sed culmen, 15-18 (16.6); tarsus, 20-22.5 

 (21.5); middle toe, 14-16.5 (15.5).« 



Adidt female.— hength (skins), 116-132 (126.3); wing, 55-59.5 (56.9); 

 tail, 45.5-50.5 (47.4); exposed culmen, 14.5-17 (15.7); tarsus, 20-21.5 

 (20.8); middle toe, 14-16.5 (15.7).^ 



« Twenty-nine specimens. 

 b Seventeen specimens. 



Specimens from different geographic areas compare in average measurements as 

 follows: ■ 



The coloration is very uniform throughout the range indicated above. Louisiana 

 specimens (the shorter wing and tail of which may be to a large degree explained by 

 the fact that most of the specimens examined are in worn summer plumage) are 

 very slightly darker above than others, but not so dark as specimens from northern 

 Florida (provisionally referred to T. I. miamensis). Those from Texas are as a rule 

 closely similar to those from the Mississippi Valley and Atlantic States, though 

 some of them, especially from the southwestern jjortions of the State, as might be 

 expected, incline toward T. I. bciiandkri in the deei)ly colored under parts, etc. 



