BLAOKBUENIAN WAEBLEE. 83 



May 12, 1885, May 6, 1886, and May 12, 1887. The latest dates in 

 spring at which the species was observed south of the United States 

 are as follows: Northern Peru, March 25; western Ecuador, March 

 17; northern Ecuador, April; Santa Marta region of Colombia, March 

 29 ; San Luis Potosi, Mexico, first week in May. Late records of occur- 

 rence in spring in Texas are May 3 on the Rio Grande; May 11, 1900, 

 near Brownsville, and May 15, 1898, at Dallas. A female was killed 

 in May, 1876, near Fort Bayard,^ N. Mex., far out of the usual range. 



Fall migration. — The fall migration of the Blackburnian warbler 

 begins in August, the southward movement of the Allegheny breeding 

 birds having its inception early in the month. Fall migrants have been 

 noted as follows: Chicago, August 12, 1900; Englewood, N. eT., 

 August 11, 1887; Washington, August 15, 1886; in Chester County, 

 S. C, by August 8, and at Bay St. Louis, Miss., August 11, 1898. 

 The first arrival from the north was noted at San Jose,^ Costa Rica, 

 August 17, 1890, in which year the species again appeared on August 

 20 and was common until October. The August birds of Costa Rica 

 represent the van of south migration. By the middle of October the 

 earliest migrants have reached Venezuela and Ecuador. The main 

 army of the Blackburnians pass the south end of the Alleghenies 

 between September 25 and October 5, and during the first tw^o weeks 

 of October are moving through San Jose, Costa Rica, and by early in 

 November are settled for the winter in Peru. Some records of late 

 migrants along this route are: Toronto, October 1, 1898; Philadelphia, 

 September 28, 1890; Washington, October 5; Lynchburg, Va., Octo- 

 ber 9, 1898; Raleigh, N. C, October 8, 1887, October 4, 1888, October 

 13, 1891; Ashevilie, N. C, September 15, 1890, September 20, 1894; 

 Chester County, S. C, October 22; Tarpon Springs, Fla., October 15, 

 1886; Key West, October 21, 1887. Along the westward route the 

 latest migrants leave the region of Lake Michigan about the 1st of 

 October. The latest fall date at St. Louis is October 2, 1896; latest 

 at New Orleans are October 9, 1896, October 18, 1897, and October 

 18, 1901. Cherrie found no Blackburnians wintering at San Jose,^ 

 Costa Rica, where the species disappeared soon after the middle of 

 October and did not reappear until spring at which time it was rare. 



One of the strange features of the life-history of the Blackburnian 

 warblers which winter iu South America is the length of time spent 

 by them in their winter home, notwithstanding the fact that the indi- 

 viduals which breed in Canada have at least 3,500 miles to travel twice 

 each year. The species is common from October to March in north- 

 ern Peru, the latest date on which it has been observed there being 

 March 25, 1878. This gives full five months in Peru and leaves only 



« Stevens, B. N. O. 0., Ill, p. 93, 1878. 

 & Cherrie, Auk, VIII, p. 278, 1891. 

 ^'Cherrie, Auk, VII, p. 336, 1890. 



