132 



[Not seen]. Size slightly larger and tail 

 longer than in F. r. rusticolus ; wing (^ 

 14.7-15.5 ; ? 15.8-17 in. ; (Sewertz). 

 283d. Falco rusticolus uralensis (Sewertz. and 

 Menzb.) Orn. Geogr. Europ. Russl., i., 

 p. 288, tab. 3 (1882). [Ural Mtns. 

 Russia.] 

 Ural Gyrfalcon. 



N. Asia 

 from the 

 Ural Mtns. 

 to Kamt- 

 schatka 

 and 

 Bering Is. f 



284. 



Wing (^ 14.6 ; differs from F. r. rusticolus 

 in having upper parts reddish brown 

 washed with ash, under parts ochraceous 

 with tear-shaped dark brown stripes ; 

 tail brown, tipped with pale ochreous, the 

 two middle feathers unbarred, rest with 

 indistinct oval transverse reddish brown 

 spots ; tarsus bare for more than half its 

 length. (Dresser). [Not seen.] 

 Falco aUaicus (Menzb.), Orn. Turkestan, 

 i., p. 272 (1892). [Altai and Minusinsk.] 

 Altai Gyrfalcon. 

 [F. lorenzi (Menzb.) a synonym.] 



Mountain 

 ranges of 

 Central 

 Asia ; 

 West 

 Siberia. 



Size small ; wing S 10-10.50, ? 10.75-11 in.; 

 above dark slate grey, darker on head and 

 paler on rump ; hinder part of cheeks and 

 sides of neck buffy white, with well-defined 

 black moustachial stripe below ; nuchal 

 collar reddish white ; tail slate grey, all 

 but middle pair of feathers barred on 

 inner webs with ferruginous ; below 

 creamy white, striped on breast and flanks 

 with black ; thighs and under tail-coverts 

 rust-red. 



t Hierofalco grebnitzkii Sewertz. and Menzb., described from Bering 

 Island, is probably synonymous with this form. 



