CHESTNUT-SIDED WARBLEE. 71 



arrivals are late: Brownsville, April 14, 1890; Corpus Christi, mid- 

 dle of April, 1900; Refugio County, April 17, 1899; Bee County, 

 April 21, 1887; Dallas, April 20, 1898; Gainesville, April 15, 188^, 

 and April 22, 1889. Records of arrival north of Texas are: Clinton, 

 Ark., April 24, 1890; Statesbury, Mo., April 30, 1891; Independence, 

 Mo., April 29, 1900, and Onaga, Kans., May 1, 1896. 



Fall migration. — The cerulean warbler is a rare migrant in the 

 States along the Atlantic coast, though it has been noted in the Caro- 

 linas, Georgia, and Florida. In northeastern Texas and Louisiana it 

 is not uncommon. Its main route of migration seems to cross the 

 Gulf of Mexico chiefly from Louisiana and Mississippi. The species 

 is one of the first to start on the southward migration. By the middle 

 of summer it has reached the Gulf coast and is well on its way to its 

 winter home. At Beauvoir and Bay St. Louis, on the coast of Missis- 

 sippi, it has appeared in different 3^ears on dates ranging from July 

 12 to 29. For a few days it is common, attaining the height of its 

 abundance about the first week in August. It then passes southward 

 so rapidly that Cherrie was able to record its presence on August 21, 

 1890, at San Jose, Costa Rica. By November it reaches central Ecua- 

 dor. Though the bulk of the birds perform their migration at this 

 early date, some laggards remain behind until late in the season. Rec- 

 ords of latest migrants are: London, Ontario, September 1, 1900; Liv- 

 onia, Mich., September 1, 1892; Beaver, Pa., September 11, 1889; 

 and Berwyn, Pa., September 27, 1889. At Eubank, K}^, migration 

 movements were recorded for the eight years 1888 to 1895. The 

 average date of the last bird seen at this locality, where the species 

 breeds abundantly, is August 23, and the latest date is September 11. 

 In Chester County, S. C, just across the mountains from Eubank, 

 where the earliest southbound birds are reported to arrive by August 

 8, the species has been seen as late as October 22. In 1886 in central 

 Texas some small flocks were reported as late as October. It would 

 seem that these were unusually late birds, for Cherrie states that the 

 latest migrants leave San Jose, Costa Rica, by the end of October. 



659. Dendroica pensylvanica (Linn.)- Chestnut-sided Warbler. 



Breeding range. — Throughout New England, New York, and Penn- 

 sylvania the chestnut-sided warbler is one of the commonest breeding 

 warblers. It also breeds regularh^, though not commonl}^, in parts 

 of northern Ohio, Indiana, and Illinois, and westward to eastern 

 Nebraska, nesting in the latter State as far south as Omaha. It has 

 been taken once in W^^oming. Its northward range is at least to 

 Newfoundland, Ontario, and the Saskatchewan. South of its normal 

 breeding range it has been noted in summer at St. Louis and at Mun- 

 ger in southeastern Missouri, and a few times in the lower Wabash 

 Valley of Illinois and Indiana. It has been once recorded as breeding 



