27. BUTEO. 107 



«'. Breast aud thighs tawny rufous. 



desertorum ad., 179. 

 b"*. Breast and thighs rufous brown. 



mdyaris ad., p. 186. 

 b''. Upper tail-coverts spotted with rufous. 



desertorum ad., p. 179. 

 k^. Bare part of tarsus on inner side less than middle toe 

 without claw ; thighs and breast bright tawny rufous. 



plumipcs ad. {japonicm), 

 p. 180. 

 h". Thighs particoloured. 

 e'". Thighs white, mottled with brown, or with rufous spots or bars, 

 e*. Subtermiual bar on tail broader than outer toe (with claw) ; 

 bars on tail not more than six in number. 



latissimus ad., p. 193. 

 /*. Subterminal bar decidedly less than outer toe. 



/". Outer upper tail-coverts not barred across, but sometimes 

 notched or mottled with white near the base. 

 c'. Primaries barred alternately for whole extent below. 



hrachyjderus, p. 183. 

 (P. Primaries white at base, uniform brown for apical half, 

 c". Bare part of tarsus on inner side greater than middle 



toe without claw .... ohsoletus juv., p. 184. 

 tP. Bare part of tarsus on inner side less than middle 



toe phimipcs juv. {japonicus,) 



p. 180. 

 m'''. Outer upper tail-coverts distinctly ban-ed across with 

 white or rufous. 

 e'. Throat white in centre, not streaked with brown. 

 «■*. Tail distinctly barred. 



a". Bars on tail not more than 7 in number. 



(attssivius j\rv., p. 193. 

 b^. Bars on tail more than 7. 

 aa. Tail sepia-brown, barred across with blackish 

 brown, below whitish. 



montanus juv. (vaniis), 

 p. 189. 

 bh. Tail ashy rufous, with brown cross bars, below 



rufescent horeaUs]\xv., p. 188. 



/*. Tail nearly entu-ely rufous, the bars very indistinct. 



borc(dis ad., p. 188. 

 p. Throat white, streaked with brown. 



g^. Tail rufous, with narrow and indistinct blackish bars. 



borealis ad., montanns ad. 

 (calunts), p. 189. 

 /i". Tail sepia, more or less tinged with rufous, always 

 regularly barred with dark brown, 

 c". Bars on tail G or 7 . . latissimtis juv., p. 193. 

 <f . Bars on tail more than 7. 



borealis juv., p. 188. 

 /'". Thighs rufous, or brown mottled with rufous, more rarely 

 with whitish. 



g'^. Throat whitish, or white streaked with brown. 

 i^. Inner web of first primary white with no bars. 

 e^. Under tail-coverts clear rufous, or slightly barred 

 with brierhter rufous. 



