FOSSIL BIRDS. 437 



Falco peregrinus Tunstall. Duck Hawk. 



Falco Peregrinus Txjnstall, Orn. Brit., 1771, 1. 



Modern form reported from Pleistocene: Potter Creek Cave, Shasta County, 

 McKittrick, and Rancho La Brea, Los Angeles, California. 



Subgenus TINNUNCUXUS Vieillot. 



Tinnunculus Vieillot, Oiseaux Amer. Sept., I, 1807, 39. Type, by subs, 

 desig., Falco columbarius Linnaeus (Walden, 1872), 



Falco columbarius Linnaeus. Pigeon Hawk. 



Falco columbarius Linnaeus, Syst. Nat., ed. 10, I, 1758, 90. 



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

 California. 



Subgenus CERCHNEIS Boie. 



Ceichneis Boie, Isis von Oken, [XIX] 1826, Heft x (Oct.), col. 970. 

 Type, by monotypy, Falco rupicolus Daudin. 



Falco sparverius Linnaeus. Sparrow Hawk. 



Falco sparverius Linnaeus, Syst. Nat., ed. 10, I, 1758, 90. 



Modern form reported from Pleistocene: Cavern deposits near Lecanto, 

 Florida; Samwel and Potter Creek Caves, Shasta County, McKittrick, 

 Carpi nteria, and Rancho La Brea, Los Angeles, California. 



^alco falconellus Shufeldt.^ 



Falco falconella Shufeldt, Trjins. Conn. Acad. Arts Sci., XIX, Feb., 1915, 

 40, pi. XV, figs. 139-143. 



Eocene (Bridger); Wyoming. 



1 Generic allocation doubtful. 



