BIRDS OF NORTH AND MIDDLE AMERICA 221 



gg. Middle toe without claw over 37 mm. long. 



h. Tail mottled or streaked, not regularly barred and not 

 uniform; if nearly uniform, whitish in color, becoming pale 

 brownish toward tip. 

 i. Underparts whitish (w. and c. North America). 



Buteo harlani, ad., light phase (p. 268) 



a. Underparts blackish ..B. harlani, ad., dark phase (p. 267) 



hh. Tail uniform reddish or uniform reddish with a subterminal 



blackish bar, or with several dark bars, in which case it 



may be reddish, dark grayish, brownish, or whitish; never 



streaked or mottled. 



i. Tail reddish, brownish, or whitish, not grayish and not 



regularly barred. 



j. Upperparts much mottled with white; head with much 



white or buff (western Canada south to Mexico and 



Louisiana) B. jamaicensis kriderii, ad. (p. 257) 



jj. Upperparts not mottled with white. 



k. Size smaller; wing, <f usually under 355 mm.; 9 under 

 370 mm. 



I. Abdomen heavily marked with blackish; rectrices 



reddish except for the black subterminal band 

 (West Indies). 



B. jamaicensis jamaicensis, ad. (p. 262) 

 II. Abdomen marked with reddish brown, only sparsely 

 with blackish; rectrices with several narrow wavy 

 black bars (southeastern Alaska to Queen Char- 

 lotte Islands). 



B. jamaicensis alascensis, ad. (p. 256) 

 kk. Size larger; wing, cf usually over 355 mm., ? over 

 370 mm. 

 I. Entire underparts dark fuscous (western North 



America) . 

 Buteo jamaicensis calurus, ad., dark phase (p. 246) 



II. Entire underparts not dark fuscous. 



7n. Entire underparts reddish brown, mottled with 

 fuscous on abdomen (western North America) . 

 Buteo jamaicensis calurus, ad., red phase (p. 246) 

 mm. Underparts whitish, more or less suffused with 

 tawny or pale rufescent. 

 n. Thighs usually unbarred or only indistinctly 

 barred. 

 0. Thighs whitish or buffy. 



p. Rectrices with several incomplete dark 



bands coming from the shaft, as well as 



the subterminal band. 



q. Size smaller; wings, cf 357-382 mm., 9 



397-412 mm. (Cuba; Isle of Pines), 



B. jamaicensis solitudinis, ad. (p. 261) 



