NORTHERN BLACK-THROATED BLUE WARBLER 235 



The species as outlined is divided into two subspecies or geographic 

 races. The black-throated blue warbler (Z>. c. caerulescens) is found 

 in Canada and in the United States south to Pennsylvania ; Cairns' 

 warbler {D. c. cairnsi) breeds in the Appalachian Mountains from 

 southwestern Pennsylvania southward. 



Migration. — Late dates of departure from the winter home are: 

 Puerto Eico — Consumo, April 3. Haiti — Morne a Cabrits, May 6. 

 Cuba — Habana, May 11. Bahamas — Cay Lobos, May 14. 



Early dates of spring arrival are: Florida — Fort Myers, March 4. 

 Georgia — Fitzgerald, April 11. South Carolina — Spartanburg, April 

 5. North Carolina — Weaverville, April 19. Virginia — Lynchburg, 

 April 21. District of Columbia — Washington, April 19. Pennsyl- 

 vania — Swarthmore, April 25. New York — New York, April 28. 

 Massachusetts — Amherst, May 2. New Hampshire — East Westmore- 

 land, April 29. Maine — Auburn, May 3. Novia Scotia — Scotch Lake, 

 May 7. Quebec — Quebec, May 7. Louisiana — New Orleans, March 

 22. Tennessee — Chattanooga, April 14. Kentucky — ^Lexington, 

 April 24. Illinois — Urbana, April 26. Ohio — Canton, April 22. 

 Michigan — Battle Creek, April 28. Ontario — Reaboro, May 3. Mis- 

 souri — St. Louis, April 18. Iowa — Sigourney, April 21. Wiscon- 

 sin — Ripon, April 28. Minnesota — Hibbing, May 8. 



Late dates of the departure of transients in spring are : Florida — 

 Daytona Beach, May 21. Georgia — Darien, May 20. South Caro- 

 lina — Clemson (College), May 15. North Carolina — Raleigh, May 

 19. Virginia — Charlottesville, May 22. District of Columbia — 

 Washington, May 30. Pennsylvania — Berwyn, June 3. Ohio — ^Ash- 

 tabula, May 29. Indiana — Fort Wayne, June 2. Michigan — Detroit, 

 June 2. Illinois — Lake Forest, June 8. Wisconsin — Racine, June 4. 

 Iowa — National, May 27. 



Late dates of fall departure are: North Dakota — Fargo, October 

 21 (bird banded). Minnesota — Minneapolis, October 3. Wisconsin — 

 Milwaukee, October 16. Iowa — Sigourney, October 20. Illinois — 

 Chicago, October 25. Michigan — Grand Rapids, November 1. In- 

 diana — Indianapolis, October 14. Ontario — Port Dover, October 27. 

 Ohio — Medina, October 30. Kentucky — Eubank, October 22. Ten- 

 nessee — Athens, October 18. Mississippi — Gulf port, October 12. 

 Quebec — Montreal, October 15. New Brunswick — Saint John, Octo- 

 ber 11. Maine — Portland, October 17. New Hampshire — Water 

 Village, October 8. Massachusetts — Cambridge, November 7. New 

 York — Fire Island, October 24. Pennsylvania — Harrisburg, October 

 24. District of Columbia — ^Washington, October 29. Virginia — ^Lex- 

 ington, October 15. North Carolina — Highlands, November 14. South 

 Carolina — Clemson (College), October 17. Georgia — Athens, No- 

 vember 2. Florida — Fernandina, November 16. 



