88 



tarsi buffish-white, barred with brown ; 

 much variation occurs, some birds being 

 much darker, almost uniform below. 



*152a. Triorchis lagopus pallidus (Menzb.), 

 Turkest., i., p. 163 (1888). [Siberia, 

 kestan, etc.] 

 Siberian Rough-legged Buzzard. 



Orn. 

 Tur- 



Wing S 416-432, ? 436-450 mm. ; much 

 paler; plumage above with broad white 

 margins ; streaks on throat and breast and 

 thighs much narrower and paler ; upper 

 tail-coverts white with a central streak 

 of brown. 



Siberia, E. of 

 Obi Valley, 

 Kamtschatka, 

 Ussuri ; in 

 winter to 

 Turkestan, 

 Black Sea, 

 Caspian and 

 China. 



■|'152b. Triorchis lagopus sancti-johannis (Gmel.), 

 S.N., i., p. 273 (1788). [Hudson Strait and 

 Newfoundland.'] 

 American Rough-legged Buzzard. 



Wing S 405-420, ? 443-450 mm. ; much 

 darker and more ochraceous below normally 

 than A. I. lagopus and varying in melanistic 

 examples to nearly uniform black. 



N. America, 

 N. of Mexico, 

 breeding N. of 

 U.S. ; migrat- 

 ing S. in winter. 



■|'153. Triorchis ferrugineus (Licht.), Abh. K. 

 Akad. Wiss. Bed. (Phys. Kl.), 1838, p. 428 

 (1839). [Near Monterey, Cal.] 

 Ferruginous Rough-leg. 



Wing (^ 424, ? 430-460 mm. ; plumage 

 above blackish with chestnut margins, 

 especially on wing coverts ; head streaked 

 with black and white ; tail silvery ashy, 

 tinged with rufous, the base and tip white ; 

 below white, more or less washed with 

 rufous, with rufous brown shaft lines on 

 chest and arrow heads or bars on flanks ; 

 thighs bright chestnut barred with black. 



W. North 

 America, S. to 

 Cahfornia : 

 in winter to 

 Lower Califor- 

 nia and N. 

 Mexico. 



