80 



143i. Buteo borealis socorroensis Ridgw., Pr. 

 U.S.N. Mus., iii., 1880, p. 220 (1881). 

 [Socorro I., type in U.S. Nat. Mus.] [nom. 

 nudem.] Idem in Biol. Centr. Amer. 

 Aves iii., p. 64, 1900. 

 Socorro Island Red-tail. 



Small form : wing $ 378-390, 9 418 mm. ; 

 Similar to B. b. culurus but with much 

 larger and stouter feet ; under parts more 

 uniformly pale cinnamomeus ; thighs deep 

 vinaceous cinnamon, indistinctly barred 

 with paler. 



Socorro Island, 

 off W. coast of 

 Mexico. 



tl43k. Buteo borealis fumosus Nelson, Pr. Biol, Tres Marias 



Soc. Wash., xii., p. 7 (1898). [Tres Marias Islands, off W. 



Is.] coast of Mexico. 

 |Tres Marias Red-tail. 



More rufous on sides of breast and belly ; 

 thighs heavily barred with brown. 



1431. Buteo borealis ventralis Gould, P.Z.S., 1837, 

 p. 10. [Santa Cruz, Patag., type in Brit. 

 Mus.] 

 Patagonian Buzzard. 



Wing ? 363-375 mm. ; exactly like imma- 

 ture Buteo borealis borealis ; tail with 8 to 

 10 dark bars^. 



Patagonia ; 

 S. Chile. 



C. Tail black. 



*f 144. Buteo lineatus Uneatus (Gmel.), S.N., 1., p. E. North 



268 (1788). [Long Is., N.Y.] America, N. to 



Red-shouldered Hawk. Canada, W. to 



edge of 



Great Plains. 



I A second example from Chile has 8 instead of lo dark bands, wider than in 

 the type : markings on belly are also blacker and it may be more mature. It 

 this form does not get the red tail it may be a species. 



