224 BULLETIN 203, UNITED STATES NATIONAL MUSEUM 



Early dates of fall arrival are: Manitoba — ^Winnipeg, August 20. 

 North Dakota — Fargo, September 18. Minnesota — Minneapolis, Au- 

 gust 25. Wisconsin — Green Bay, August 1. Illinois — Chicago, 

 August 19. Ontario — Cobalt, August 12. Michigan — Whitefish 

 Point, August 5. Ohio — Toledo, August 14. New Hampshire — 

 Pequaket, August 24. Vermont — Wells Kiver, August 4. Massa- 

 chusetts — Harvard, August 30. New York — Khinebeck, August 3. 

 Pennsylvania — Pittsburgh, August 28. District of Columbia — 

 Washington — August 4. Virginia — Charlottesville, September 4. 

 North Carolina — Weaverville, September 15. South Carolina — 

 Charleston, September 13. Georgia — Savannah, September 23. 

 Florida — Sombrero Key, September 17. Bahamas — Cay Lobos, Oc- 

 tober 20. Cuba — Santiago de las Vegas, September 20. Dominican 

 Republic — Sanchez, October 23. Puerto Rico — Faro de Cabo Rojo, 

 September 17. 



Banding. — The one banding recovery available is especially interest- 

 ing as it indicates a peculiar migration. A Cape May warbler banded 

 at Elmhurst, Long Island, N. Y., on September 12, 1937, was caught 

 by a cat October 15, 1937 at Cleveland, Tenn. 



Casual records. — In British Columbia one was collected June 17, 

 1938, at Charlie Lake. In California one was collected at Potholes 

 on the Colorado River, September 23, 1924. A specimen labeled 

 "Arizona" taken before 1876 is in the museum in Paris. The Cape 

 May warbler has been once observed in Bermuda, April 3, 1909. 



Egg dates. — Maine : 2 records, June 6 to 15. 



New Brunswick : 68 records, June 10 to 29 ; 43 records, June 12 to 

 20 ; indicating the height of the season. 



DENDROICA CAERULESCENS CAERULESCENS (Gmelin) 



NORTHERN BLACK-THROATED BLUE WARBLER 



Plates 29, 30 



HABITS 



This neatly dressed warbler is one of our commonest migrants 

 throughout the eastern half of the United States, but as a breeding 

 bird it is confined mainly to the northernmost States and to extreme 

 southern Canada, almost wholly within the Canadian Zone. Its 

 rather long common name describes this dainty bird. 



Spring. — From its principal winter resort in the West Indies, the 

 black-throated blue warbler migrates through the Bahamas and 

 Florida to the Atlantic States and northward, along the Alleghenies 

 and to the eastward of them, to its northeastern breedings grounds. 

 According to Prof. W. W. Cooke (1904) the earliest arrivals usually 



