236 BULLETIN 174, UNITED STATES NATIONAL MUSEUM 



principally upon the larvae of insects, found in the cracks and fissures of the 

 "red pine" of the country. I dissected a specimen killed at Fort Dalles, January 9, 

 1855, finding the coats of the stomach (gizzard) very thick and muscular, its 

 cavity filled with the white larvae of insects, together with fine gravel. 



DISTRIBUTION 



Range. — ^^Vestern United States, southwestern Canada, and north- 

 vi'estern Mexico; migratory in tlie nortliern areas. 



Breeding range. — Lewis's woodpecker breeds north to southern 

 British Cohnnbia (Courtenay, Okanagan Landing, and Arrow Lake) ; 

 Montana (Fortine, Flathead Lake, and Great Falls) ; and south- 

 western South Dakota (Elk Mountains). East to southwestern 

 South Dakota (Elk Mountains) ; southeastern Wyoming (Laramie 

 Hills and Laramie) ; eastern Colorado (Boulder, Denver, Colorado 

 Springs, Boone, and Rouse Junction) ; and New Mexico (Bojuaquc 

 and Sacramento Mountain). South to southern New Mexico (Sacra- 

 mento Mountain) ; Arizona (San Francisco Mountain and Fort 

 "Wliipple) ; and southern California (Paso Robles). West through 

 the coast ranges of California, Oregon, Washington, and British 

 Columbia (Victoria, Comox, and Courtenay). 



Winter range. — On the Pacific coast the species is resident north 

 to the Columbia River (Portland and The Dalles, Oreg.) and is 

 found south at this season to northern Baja California (Catavina 

 and Guadalupe Valley). During two different winters these wood- 

 peckers were recorded wintering in southern British Columbia 

 (Alowna in 1920-21, Vernon in 1928-29, and Summerland 1928-29). 



In the Rocky Mountain region it winters north to north-central 

 Colorado (Boulder and Denver) and is found south to central Texas 

 (San Angelo) ; southern New Mexico (Guadalupe Mountains) ; and 

 northern Sonora (5 miles southwest of Nogales, Ariz.). 



SpHng migration. — At neither season is the migratory movement 

 extensive, but the following early dates of arrival in the northern parts 

 of the breeding range may be considered typical : Wyoming — Wheat- 

 land, April 15; Laramie, May 5; Yellowstone Park, May 14. Mon- 

 tana — Fortine, April 27; Big Hole River, May 1; Corvallis, May 6. 

 Washington — Grand Dalles, April 23; Prescott, April 26; Tacoma, 

 April 27. British Columbia — Okanagan Landing, April 20; Arrow 

 Lakes, April 28 ; Sumas, May 3. 



Fall migration. — The following are late dates of departure in 

 autumn : British Columbia — Arrow Lakes, October 16 ; Kelowna, 

 October 23; William Head, November 23. Washington — Prescott, 

 September 18 ; North Dalles, October 10 ; Yakima, October 29. Mon- 

 tana — Columbia Falls, September 9; Missoula, September 17; Gold 

 Creek, September 21. Wyoming — Laramie, September 24; Carey- 

 hurst, September 26 ; Wheatland, October 4. 



