432 CHECK LIST OF NORTH AMERICAN BIRDS. 



Subgenus BUTEO LACfipfeDE. 



Buteo borealis (Gmelin). Red-tailed Hawk. 



Falco borealis Gmelin, Syst. Nat. I, Pt. i, 1788, 266. 



Modern form reported from Pleistocene: Seminole Field, Venice, and Mel- 

 bourne (Stratum 2), Florida; Potter Creek Cave, Shasta County, and 

 Rancho La Brea, Los Angeles, California. 



Buteo lineatus (Gmelin). Red-shouldered Hawk. 



Falco liiwatus Gmelin, Syst. Nat., I, Pt. i, 1788, 268. 



Modern form reported from Pleistocene: Seminole Field, Venice, and Mel- 

 bourne, Florida. 



Buteo platypterus (Vieiliot). Broad- winged Hawk. 



Spandus platypterus Vieillot, Tableau Eneycl. Meth., Ill, 1823, 1273. 

 Modern form reported from Pleistocene: Seminole Field, Florida. 



Buteo swainsoni Bonaparte. Swainson's Hawk. 



Buteo swainsoni Bonaparte, Geog. and Comp. List, 1838, 3. 



Modern form reported from Pleistocene: Rancho La Brea, Los Angeles, 

 California. 



Buteo typhoius Wetmore. 



Buteo typhoim Wetmore, Bull. Amer. Mus. Nat. Hist., XLVIII, Art. 12, 

 Dec. 3, 1923, 489, figs. 3-5. 



Miocene: Snake Creek beds ^ and Lower Harrison beds south of Agate, Sioux 

 County, Nebraska. 



Subgenus TRIORCHIS Kaup. 



Triorchis Kaup, Skizz. Entw.-Gesch. Eur. Thierw., 1829, 84. Type, by 

 monotypy, Falco lagopus Gmelin = Falco lagopus Pontoppidan. 



Buteo regalis (Gray). Ferruginous Rough-leg. 



Arch'ibuteo regalis Gray, Genera of Birds, I, Pt. i. May, 1844, pi. vi. 



Modern form reported from Pleistocene: Hawver Cave, Eldorado Count}', 

 and McKittrick, California. 



Genus GERANOAETUS Kaup. 



Geranoaetus Kaup, Class. Siiug. und Vogel, 1844, 122. Type, by mono- 

 typy, Falco aguia Temminck = Spizaetus melanoleucus Vieillot. 



' Type locality. 



