54 NOBTH AMERICAN WARBLEUS. 



Yucatan (though much more commonly in spring migration), and also 

 in Chiapas. During the spring migration it is common on the coast 

 of Tabasco and Vera Cruz. The western extension of its winter range 

 in Mexico can not be determined from present records and material, 

 as these are insufficient to distinguish sestiva from the various sub- 

 .species it meets in Mexico — rubiginosa from Alaska, sonorana from 

 Arizona, and the local race, dugesi, from Guanajuato and the central 

 plateau region. 



There is a single record of the capture of the yellow warbler on the 

 island of Grenada" November 14, 1882. This is the only certain rec- 

 ord of the occurrence of the bird in the West Indies, where closely 

 allied resident species occupy its favorite localities. This division 

 of districts between the resident and the migrant species is especially 

 noticeable on the north coast of Honduras, where D. sestiva occurs on 

 Ruatan Island* and on the mainland at Truxillo, " but seems not to visit 

 the neighboring island of Bonacca, which is occupied by D. hrycmti- 



Spring migration. — The yellow warbler is not an early spring 

 migrant, and is one of the most irregular of the family in its move- 

 ments. • There is no record of the bird in spring in Florida. It arrives 

 in Alabama, Georgia, and South Carolina no earlier than in North 

 Carolina, as is shown by the following dates of earliest spring records: 

 Coosada, Ala., April 26, 1878; Greensboro, Ala., April 14, 1888; 

 Shelby, Ala., April 25, 1898; Darien, Ga., April 28, 1890; Savannah, 

 Ga., April 16, 1894; Kirkwood, Ga., April 23, 1899, April 10, 1900, 

 April 17, 1901; Frogmore, S. C, April 17, 1885, The average date 

 of arrival at Raleigh, N. C, for eight yeai's was April 12, and the 

 earliest date April 5, 1888. At Asheville, N. C, in the mountains, 

 the average date was about three days later than at Raleigh. Quite 

 voluminous records show that yellow warblers arrive on the average 

 at Newmarket, Va., April 22; Washington, April 20; Beaver, Pa., 

 April 23; Renovo, Pa., April 30; Englewood, N. J., and south- 

 eastern New York, May 1; central Connecticut, Providence, R. I., 

 and Boston, May 4; Randolph, Vt., May 9; southern New Hampshire, 

 May 10; southern Maine, May 11; Montreal, May 10; Quebec, May 

 15; St. John, New Brunswick, May 24; Chatham, New Brunswick, 

 May 28; Pictou, Nova Scotia, May 14; Halifax, Nova Scotia, May 14; 

 North River, Prince Edward Island, May 25; Hamilton River, Quebec, 

 May 31. 



aWells, Proc. U. S. Nat. Mus., IX, p. 611, 1886 (Z). petechia=D. sestiva). 



ftSalvin, Ibis, p. 247, 1888. 



"Ridgway, Proc. U. 8. Nat. Mua., X, p. 579, 1888. 



