ORDER RAPTORES. I93 



352. Haliaeetus leucocephalus (Linn.). 



Bald Eagle. 



Falco leucocephalus Linn. S. N. ed. 12, L 1766, 124. 

 HalicEtus leucocephalus Boie, Isis, :822, 548. 



[B 41, 43, C .362, R 451, C 534.] 



Hab. North America at large, south to Mexico. 



Subfamily FALCONING. Falcons. 



Genus FALCO Linnaeus. 



Falco Livn. S. N. ed. 10, L 1758, 88. Type, by elimination, F. subbu- 

 teo Linn. 



Subgenus HIEROFALCO Cuvier. 



Hierofalco Q\}\. R^g. An. L 1817, 312. Type, Falco candicans 

 Gmel. =: F. islandus Brunn. 



353. Falco islandus Brunn. 



White Gyrfalcon. 



Falco islandus Brunn. Orn. Bor. 1764, 2. 



[B II, C 341 a, R 412, C 501.] 

 iIab. Arctic regions, including Arctic America and Greenland. 



354. Falco nisticolus Linn. 



Gray Gyrfalcon. 



Falco rusticolus Linn. S. N. ed. 10, L 1758, 88. 

 [B 12, C — ^, R 412^, C 500.} 



Hab. Iceland, Southern Greenland, and Northeastern North Amer- 

 ica, straggling southward in winter to Southern New England. 



354a. Falco nisticolus gyrfalco (Linn.'. 



Gyrfalcon. 



Falco gyrfalco Linn. S. N. ed. 10, L 1758, 91. 

 Falco rusticolus g)'?falco ^TE.]'ii. Auk, II. 1885, 187. 



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