LIST OF TllK mUDS OF EASTERN NORTH AMERICA. 357 



A-^<^;U. (iEMs HALIAETUS. Savk;. 



284 (.1)1) HALIAETUS ALBICILLA. (Linn.) Gray Sea Eagle. 



Occurs iu Greeuhind, but has not been taken in the United States. 



285 (:552) HALIAETUS LEUCOCEPHALUS. (Linn.) Bald Eagle. 



'rhroughout North America to northern Mexico ; breeding throughout its 

 range. 



Mr. C. II. Townsend has hitely separated the northern and southern birds, 

 giving tlie range of Ilnlinetus leucoccplmlus as pnu'tically restricted to tlie 

 United States. To tlie bird which occurs in the British possessions west 

 to Alaska, which is larger, he has given the name of Ilalia'itus leucocepha- 

 lus alascanus^ Northern Bald Etigle. 



Subfamily FALCONIN^E. Falcons. 

 Genus FALCO. Linx. 



286 (353) FALCO ISLANDUS. Buunx. White Gyrfalcon. 



Arctic America ; south in winter to Labrador and northern Maine. 



287 (354) FALCO RUSTICOLUS. Lynn. Gray Gyrfalcon. 



Arctic America ; accidental in winter as far south as Maine. 



288 (354a) Falco msticolus gyrfalco. (Linn.) Gyrfalcon. 



A grayish race with faintly barred back ; occurs in Arctic America ; 

 accidental in winter in New England (Massachusetts and Rhode 

 Island). 



289 (3546) Falco ritsticolus obsoletus. (Gmel.) Black Gyrfalcon. 



A dark race with back dark slate ; sometimes almost black and not 

 barred ; underparts dark ; it occurs in Labrador ; accidental in 

 winter as far south as Canada, Maine, Massachusetts, and New 

 York. 



290 (355) FALCO MEXICANUS. Schleg. Prairie Falcon. 



AVestern species ; casual iu Illinois ; breeds throughout its range. 



Subgenus RHYNCHODON. Nitzsch. 



291 (356) FALCO PEREGRINUS ANATUM. (Bonap.) Duck Hawk. Peregrine 



Falcon. 



North America and northern South America ; breeds throughout its 



range. 



Subgenus /ESALON. Kaup. 



292 (357) FALCO COLUMBARIUS. Linn. Pigeon Hawk. 



North America, West Indies, and northern South America; breeds from 

 northern border of United States, northward. 



293 (3581) FALCO REGULUS. Pall. Merlin. 



European species ; recorded from Greenland. 



Subgenus TINNUNCULUS. Linn. 



294 (3591) FALCO TINNUNCULUS. Linn. Kestrel. 



European species ; once taken in Massachusetts. 



