ORDER PICI. 189 



Genus XENOPICUS Baird. 



Xenopicus Baird, Rep. Expl. & Surv. R. R. Pac, IX, 1858, 83. Type, 

 by monotypy, Leuconerpes alholarvatus Cassin. 



Xenopicus albolarvitus (Cassin). White-headed Woodpecker. [399.] 



Leuconerpes alholarvatus Cassin, Proc. Acad. Nat. Sci. Phila., V, 1850, 

 106. (Oregon Cafion, near Georgetown, 12 miles from Sutter's Mill, 

 California.) 



Range. — Transition Zone in mountains from southern British 

 Columbia to southern California, east to eastern Oregon, western 

 Idaho, and western Nevada. 



Genus PICOIDES LAcipfcoE. 



Picoides Lacbpiide, Tableaux Ois., 1799, 7. Type, by subs, desig., Picus 

 iridactylus LinN/BUS (Gray, 1840). 



Picoides arcticus (Swainson). Arctic Three-toed Woodpecker. [400.] 



Picus {Apternus) arcticus Swainson, Fauna Bor.-Am., II, 1831 (1832), 

 313. (Near sources of Athabaska River, Lat. 53° N., eastern declivity 

 of Rocky Mountains.) 



Range. — Canadian Zone of northern North America from southern 

 Alaska, central Yukon, southern Mackenzie, central Keewatin, and 

 southern Ungava south to the Sierra Nevada of California and moun- 

 tains of Nevada, Idaho, Wyoming, South Dakota (Black Hills), Minne- 

 sota, Michigan, northern New York, Vermont, New Hampshire, and 

 Maine; casual in winter to Nebraska, Illinois, Ohio, Massachusetts, 

 and Connecticut. 



Picoides americanus Brehm. 



Range. — Northern North America, south in Rocky Mountains to 

 New Mexico and Arizona. 



a. Picoides americanus americanus Bbbhm. Three-toed Woodpecker. 

 [401.] 

 Picoides americanus Brehm, Handbuch Vogel Deutschl., 1831, 195. 

 ("Amerika.") 



