80 



143i. Biiteo borealis socorroeiisis Ridgw., Pr. 

 U.S.N. Mus., iii., 188(1, p. 220 (1881j. 

 [Socorro I., type in L'.S. Xat. Mus. j \iiom. 

 nudcm.\ Idem in Biol. Ccnlr. Anur. 

 Aves iii., p. 64, 1900. 

 Socorro Island Red-tail. 



Socorro Island, 

 off W. coast of 

 Mexico. 



Small form : wing ^ 378-390, S 418 n;m. ; 

 Similar to B. b. culiirus but with much 

 larger and stouter feet ; under parts more 

 viniformly pale cinnamomeus ; thighs deep 

 vinaceous cinnamon, indistincth' barred 

 with paler. 



f 143k. Buteo borealis fumosiis Nelson, Pr. Biol. Tres Marias 



Soc. Wash., xii., p. 7 (1898). {Ties 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. Bitteo borealis vcntralis Gould, P.Z.S., 1837, 

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

 Mus.J 

 Patagonian Buzzard. 



Wing 5 363-375 mm. ; exactly like inmia- 

 ture Buteo borealis borealis ; tail with 8 to 

 10 dark bars^. 



C. Tail black. 



Patagonia 

 S. Chile. 



*"i"144. Buteo lineatus lineatus ((imel.), S.N., 1., 

 268 (1788). [Long Is., A'. V.J 

 Red-shouldered Hawk. 



E. North 

 America, N 

 Canada, W. 

 edge of 

 Great Plains. 



to 

 to 



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. If 

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



