292 BULLETIN 195, UNITED STATES NATIONAL MUSEUM 



Guatemala (Quetzaltenanga and San Incas) ; El Salvador (San Jose 

 del Sacare and Volcan de San Miguel) ; and Costa Rica (Hacienda 

 El Pelon, Guanacaste). South to Costa Rica (Hacienda El Pelon, 

 Guanacaste) . West to Costa Rica ; Guerrero, Mexico (Chilpancingo) ; 

 Sinaloa (LosLeones and Suratata) ; Baja California (Cape San Lucas, 

 Cedros Island, and Guadalupe Island) ; California (Santa Barbara 

 Islands and Berkeley) ; east of the Cascades in northern California 

 (Chico and Mount Shasta) ; Oregon (Klamath Lake and The Dalles) ; 

 Washington (Yakima and Chelan) ; and British Columbia (Cache 

 Creek). 



Winter range. — The rock wren is resident in the southern part of 

 its range and in winter is found north to northern California (west 

 slope of Mount Lassen and Death Valley) ; Arizona (Fort Mojave, 

 Grand Canyon, and Fort Verde) ; New Mexico (San Antonio and Las 

 Vegas) ; occasionally to southern Colorado (Pueblo) ; and southern 

 Texas (San Angelo, Kerrville, Boerne, and Laredo). There are rec- 

 ords of winter occurrence somewhat north of what may be considered 

 the normal range. 



The entire species as outlined is divided into three races within our 

 limits, others occurring in Mexico and Central America. The common 

 rock wren {S. o. ohsoletus) occurs south to San Luis Potosi, Zaca- 

 tecas, and Baja California ; the San Benito rock wren {S. o. tenuiros- 

 tris) breeds on the San Benito Islands of Baja California; and the 

 Guadalupe rock wren {S. o. guadelowpensis) is found on Guadalupe 

 Island, Baja California. 



Spring migration. — Some early dates of spring arrival are : Texas — 

 Amarillo, March 21. Nebraska — North Platte, April 22. South Da- 

 kota — ^White River, April 18. North Dakota — Charlson, May 10. 

 Saskatchewan — Eastend, May 3. Colorado — Fort Morgan, April 12. 

 Wyoming — Laramie, April 29. Montana — Great Falls, May 5. 

 Utah — Salt Lake County, April 11. Idaho — Pocatello, April 22. 

 Oregon — Klamath Basin, March 28. Washington — ^Wallula, March 

 27. British Columbia — Okanagan Landing, April 26. 



Fall migration. — Some late dates of fall departure are: British 

 Columbia — Okanagan Landing, September 29. Washington — Ya- 

 kima, September 13. Oregon — Weston, October 3. Utah — Toquer- 

 ville, October 13. Wyoming — ^Laramie, October 21. Colorado — 

 Boulder, October 2. Saskatchewan — Eastend, September 15. North 

 Dakota — Charlson, October 3. Nebraska — Ashby, September 24. 

 Texas — Somerset, October 19. 



Casual records. — There are a number of records for the rock wren 

 beyond its normal range. In Alberta it was recorded at Edmonton on 

 June 29, 1898, and at Chippewyan on June 12 and 17, 1914. One was 

 seen at Dell Rapids, S. Dak., on July 20, 1924; one was seen at Pipe- 

 stone, Minn., on May 13, 1922 ; one was reported at Monguagon, Mich., 



