GRINNELL WATER-THRUSH. 105 



8, 1899. At Key West, Fla., the first southbound migrant of the 

 year was noted August Ifi, 1889. One was taken on August 28, 

 1858, in Jamaica, where Gosse says the earliest fall migrants arrive 

 at the end of August, immediately after which the species becomes 

 abundant. Some early records of fall occurrence are: Mona Island'' 

 east of Porto Rico, August 18, 1901; southeastern Nicaragua, Septem- 

 ber 20, 1892; San Jos6, Costa Rica, September 14, 1889; Escazu,'' 

 Costa Rica, August 13, 1902; Bonda, Colombia, September 8, 1898; 

 Caracas, Venezuela, October 20. Here appears to be strong evidence 

 that these earliest arrivals follow comparatively straight lines of migra- 

 tion from the United States. The birds found at Bonda, for instance, 

 probably did not come from the west by way of Central America and 

 Yucatan, but took a straight flight from some of the "West Indies to 

 the coast of South America. 



The following records show how late in the fall some water-thrushes 

 linger: Durham, N. H., September 26, 1899; Portland, Conn., October 

 3, 1894; Ossining, N. Y., October 3; Renovo, Pa., October 5, 1902; 

 Germantown, Pa., October 17, 1885; Raleigh, N. C, October 1, 1887 

 and 1891. 



675a. Seiurus noveboracensis notabilis (Ridgw. ). Grinnell Water-Thrush. 



This name is given in general to the water-thrushes of western North 

 America that breed from Minnesota and Nebraska to Alaska, but the 

 subspecies is not strictly confined to this region. In migration it 

 passes to the Atlantic coast, sometimes, though rarely, as far north 

 as Washington, D. C, and New Jersey. It is more common south- 

 ward, until in South Carolina both forms are commonly found. 

 Among the few certain records of the occurrence of the subspecies 

 south of the United States are those made at Tapana, Oaxaca, April, 

 1869; Ceiba," January, and Yaruca,*" February, 1902, both in Honduras; 

 on both coasts of Nicaragua, and at Chirua,*^ Colombia, at 7,000 feet. 



Spring migration. — It is probable that the following records of aver- 

 age date of spring arrival of the water-thrush refer chiefly to the west- 

 ern form: St. Louis, April 27; Chicago, May 2; Keokuk, Iowa, May 

 3; Lanesboro, Minn., May 5; Minneapolis, Minn., May C; northwest- 

 ern Minnesota, May 9; Aweme, Manitoba, May 15. The early migrants 

 travel so fast that by May 16, 1901, they were noted near Lake Atha- 

 basca, and they arrived at Fort Simpson, Mackenzie, May 22, 1860, 

 May 20, 1861, and May 14, 1904. Migration in the Rocky Mountains 

 is much later. The birds scarcely reach northern Colorado before the 



«Bowdish, Auk, XX, p. 19, 1903. 

 * Specimen in the Carnegie -Museum, Pittsburg, Pa. 

 « Bangs, Bui. Mus. Comp. Zool., XXXIX, p. 15.3, 1903. 

 (« Bangs, Prof. Biol. Soc. Wash., XIII, p. 105, 1899. 



