272 BULLETIN 2 03, UNITED STATES NATIONAL MUSEUM 



Winter range. — The Audubon warbler is found in winter north to 

 southwestern British Cohimbia (Comox and Chilliwack). East to 

 southwestern British Columbia (Chilliwack) ; central Washington 

 (Yakima) ; occasionally eastern Washington (Cheney) ; northeastern 

 Oregon, casually (Pendleton and Legrande) ; central California 

 (Marysville and Fresno) ; casually to southwestern Utah (St. George 

 and Zion National Park) ; central Arizona (Fort Mojave, Fort Verde, 

 Salt Kiver National Wildlife Refuge, and Tombstone) ; southern 

 Texas (El Paso, rarely Knickerbocker, and Brownsville) ; Tamaulipas 

 (Matamoros and Victoria) ; western Veracruz (Orizaba) ; and central 

 Guatemala (San Jeronimo). South to Guatemala (San Jeronimo, 

 Tecpan, and San Lucas) ; casual or accidental south to central Costa 

 Rica (Juan Vihas). West to western Guatemala (San Lucas and 

 Totonicapan) ; Oaxaca (Parada) ; Guerrero (Chilpancingo and 

 Coyuca) ; western Jalisco (Tonila) ; Nayarit (Tepic) ; southern Sin- 

 aloa (Mazatlan) ; western Baja California (Santa Margarita and 

 Natividad Islands) ; and the west coast of the United States to south- 

 western British Columbia (Comox). 



The preceding range is for the species as a whole of which two sub- 

 species or geographic races are recognized. The Pacific Audubon's 

 warbler {D. a. auduboni) breeds south to southern California, central 

 Arizona, and New Mexico ; the black- fronted Audubon's warbler {D. 

 a. nigrifrons) breeds from the Huachuca Moutains, Ariz., through the 

 mountains to southwestern Chihuahua. 



Migration. — ^Late dates of spring departure from the winter range 

 are: Guatemala — Tecpan, April 23. Sonora — Moctezuma, May 23. 

 Texas— Marathon, May 18. Kansas — Fort Wallace, May 27. Ari- 

 zona — Prescott, May 19. California — Fresno, May 3. 



Early dates of spring arrival are : Kansas — Garden City, April 22. 

 Nebraska — Hastings, April 14. New Mexico — Apache, March 7. 

 Colorado — Colorado Springs, April 12. Wyoming — Laramie, April 

 21. Montana— Fortine, April 14. Alberta— Banff, April 23. Utah— 

 St. George, March 8. Nevada — Carson City, April 10. Idaho — Sand- 

 point, April 16. California — Grass Valley, April 10. Oregon — Pros- 

 pect, March 6. Washington — Shelton, March 4. Bi'itish Columbia — 

 Summerland, March 30. 



Late dates of fall departure are: British Columbia — Okanagan 

 Landing, October 24. Washington — Pullman, November 13. Ore- 

 gon — Prospect, November 18. Idaho — Bayview, October 26. Utah — 

 St. George, December 7. Alberta — Edmonton, September 11. Mon- 

 tana — Fortine, October 24. Wyoming — Laramie, November 9. 

 Colorado — Fort Morgan, October 30. New Mexico — Silver City, No- 

 vember 10. 



