122 



EEVIEW OF AMERICAN BIKDS. 



[PAKT I. 



B. Tail feathers, except central, black; 

 the exposed surface and tips only varied 

 with white. 



1. Bill and legs very stout, the former 

 longer than the head. Wings longer 

 than tail. A concealed nuchal half 

 collar of white streaks. 



Color much as in T. bewickii, but 

 whiter beneath. Outside of 

 wings very obsoletely banded 



2. Bill and legs more slender ; some- 

 times the bill shorter than head. 

 Tail longer than the wings. No con- 

 cealed nuchal half collar. 



Above dark rufous brown ; be- 

 neath plumbeous white ; flanks 

 tinged with brown. Rump and 

 exposed secondaries distinctly 

 banded. Quills and middle 

 tail feathers brownish-black . 

 Above ashy-brown ; beneath, in- 

 cluding flanks, clear white ; 

 rump ashy, and, like seconda- 

 ries, very obsoletely barred. 

 Quills and middle tail feathers 

 grayish-brown 

 Colors intermediate between the 

 two last. Bill longer, from 

 nostril, .50, from gape .81, in- 

 stead of .39 and .70 

 2. Exposed surface of wings barred ; upper tail 

 coverts not barred. Beneath white. Tail 

 feathers reddish-brown, banded with black, 

 except in peteiiicus, 



a. Above quite uniform reddish-chestnut. 



1. Sides ashy ..... 



2. Sides brownish .... 

 B. Grayish-brown above, rump rufescent. 



1. Sides brownish .... 

 Crissuni plain, without bands. 



1. Outside of wings obsoletely banded. Beneath 



white ; flanks and crissum fulvous. 

 a. Bill shorter than tarsus 



2. Outside of wings and wing coverts distinctly 



banded. Beneath white ; flanks and anal 

 region very pale fulvous, 

 a. Bill longer than tarsus 



3. Similar to last above j throat white ; rest of 



under parts fulvous. 



petenicus. 



heivichiu 



leucogaster. 



spilurus. 



poliopleura, 

 rufaLbus, 



sinaloa. 



moaestus. 



albipectus. 



