NORTHERN AND MARYLAND YELLOWTHROATS 563 



southern central and southeastern New Mexico, and western Texas, 

 south to northeastern Sonora and northwestern Chihuahua ; the tule 

 yellowthroat {G. t. scirpicola) is a resident race in southern California, 

 southeastern Nevada, southwestern Utah, and westernmost Arizona, 

 south to northern Baja California; the Brownsville yellowthroat {G. t. 

 insperata) is a resident race of the Rio Grande delta region below 

 Brownsville, Texas; the San Bias yellowthroat {G. t. modesta) is a 

 resident race along the western coast of Mexico from central western 

 Sonora through Sinaloa and Nayarit to Colima; and the northern 

 plains yellowthroat {G. t. canipicola) breeds in southern Yukon, north- 

 eastern British Columbia, northern Alberta, south-central Saskatche- 

 wan, and southwestern Manitoba ; south to southeastern Alaska, central 

 Oregon, central Idaho, northeastern Colorado, and North Dakota. 



Migration. — ^Late dates of spring departure are: Colombia — ^Lake 

 Macotama, Santa Marta region, April 21; Baudo Mountains, near 

 Nuqui, June 16. El Salvador — Lake Chanmico, May 17. Costa 

 Rica — Basin of El General, May 2. Honduras — near Tela, April 28. 

 Guatemala — near Quirigua, May 7. Tabasco — Balancan, May 9. 

 Puerto Rico — Desengano, April 18. Dominican Republic — May 8. 

 Jamaica — Spanishtown, May 10. Cuba — Cienfuegos, May 12. Ba- 

 hamas — May 10. Florida — Lower Florida Keys, May 21. Arizona — 

 Tucson, June 7. California — Pasadena, May 20. 



Early dates of spring arrival are: Bahamas — Cay Sal, March 13. 

 Florida — Sombrero Key Light, March 3. Alabama — Greensboro and 

 Shelby, March 11 ; Birmingham, March 14 (average of 10 years, March 

 17). Georgia — Savannah, March 12. South Carolina — Columbia, 

 March 11. North Carolina — Raleigh, High Rock, and Washington, 

 March 20 (average of 30 years at Raleigh, March 28). Virginia — 

 Cape Henry, March 7 (average, April 7) ; Rockbridge County, April 

 18. West Virginia — Bluefield, April 14; French Creek, April 27 

 (average of 17 years, May 1). District of Columbia — ^Washington, 

 April 11 (average of 57 years, April 22) . Maryland — Baltimore and 

 Patuxent Wildlife Research Refuge, April 12. Delaware — Kent and 

 Sussex Counties, March 4 (average of 21 years, March 20) . Pemisyl- 

 vania — Carlisle, April 3; Kennett Square, April 15. New Jersey — 

 Camden, April 3; Trenton, April 20. New York — Staten Island, 

 April 10 ; Poughkeepsie, April 14 ; Watertown, April 22. Connecti- 

 cut — CarroUton, April 25. Massachusetts — ^Woods Hole, April 17. 

 Vermont — St. Johnsbury, May 1. New Hampshire — East Westmore- 

 land, May 3. Maine — Waterville, April 18; South Harpswell, May 

 4. Quebec — Montreal, May 4. New Brunswick — Fredericton, April 

 30. Nova Scotia — Yarmouth, May 9. Newfoundland — St. Andrews, 

 May 27. Louisiana — Bains, March 30. Mississippi — Edwards, 



