tarsi buffish-white, barred with brown ; 

 much variation occurs, some birds being 

 much darker, almost uniform below. 



*152a. Triorchis lagopus pallidus (Menzb.), Orn. Siberia, E. of 



Turkest., i., p. 163 (1888). {Siberia, Tur- Obi Valley, 



kestan, etc.] Kamtschatka, 



Siberian Rough-legged Buzzard. Ussuri ; in 



winter to 



Wing <J 416-432, ? 436-450 mm. ; much Turkestan, 



paler; plumage above with broad white Black Sea, 



margins ; streaks on throat and breast and Caspian and 



thighs much narrower and paler ; upper China, 

 tail-coverts white with a central streak 

 of brown. 



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

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

 Newfoundland.] 

 American Rough-legged Buzzard. 



Wing c? 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. 



■fl53. Triorchis ferrugineus (Licht.), Abh. K. 

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

 (1839). [Near Montetey, 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. 



to 



W. North 

 America, S 

 California : 

 in winter to 

 Lower CaUfor- 

 nia and N. 

 Mexico. 



