WATER-THRUSH. 103 



water-thrushes that winter in British Guiana to reach their destination 

 either eastward along the coast of the mainland or southward by way 

 of the islands. 



The West Indian records of the water-thrush unquestionably relate 

 to the eastern bird, but on the mainland from Mexico to South Amer- 

 ica the two forms occur together in winter. Hence it is not certain 

 that all of the following records relate to the eastern bird to which 

 they are ascribed. This form appears to have been taken in winter 

 by the parties of the Biological Survey near the City of Mexico and in 

 spring in Vera Cruz, and also in spring by Chapman at Las Vigas 

 (8,000 feet), in Vera Cruz. During the spring of 1902 the species was 

 seen from April 20 to May 3 in northern Coahuila. It is common in 

 Yucatan along the east coast and the neighboring islands, but most of the 

 records are made during the spring, when the water-thrush is a very 

 common migrant in the State. It occurs throughout Guatemala to an 

 elevation of nearly 6,000 feet; on both coasts of Nicaragua; on both 

 coasts of Costa Rica, and also in the interior to at least 4,000 feet, 

 though not common at this altitude, and on both coasts and in the 

 lower mountains of Panama. Judging from the records, the bird is 

 common in the northern half of Colombia,^ being taken in fall migra- 

 tion on the northern coast and during the winter in the interior as far 

 south as Minca,* Medellin,^ and Bucaramanga.^^ It seems to be most 

 common from 2,000 to 6,000 feet. Its range extends still farther east 

 in northern South America to Venezuela ''- and British Guiana, where 

 it has been taken on the coast at Caracas-^ and Bartica Grove,^ and in 

 the interior on Mount Roraima.^^ It is abundant in the valle^^s of the 

 Orinoco and Caura rivers,^ as attested by many specimens taken, 

 between October 21 and March 21. 



Spring migration. — The results of the few attempts made to sep- 

 arate the migration records of the two forms of the water-thrush in 

 the United States would seem to indicate that the western form 

 migrates in spring earlier than the eastern, and that birds which some- 

 times winter in Florida as far north as St. Augustine are from the West. 



«^ Bangs, Proc. Biol. Soc. Wash., XIII, p. 105, 1899; Allen, Bui. Am. Mus. Nat. 

 Hist., XIII, p. 177, 1900; Auk, XVII, p. 366, 1900; Cassin, Proc. Acad. Nat. Sci. 

 Phil., XII, 191, 1860. 



& Salvin and Godman, Ibis, p. 117, 1880. 



cSclater and Salvin, P. Z. S., p. 493, 1879; Sharpe, Cat. Birds Brit. Mus., X, pp. 

 346, 653, 1885. 



^Berlepsch, J. f. Orn., p. 282, 1884; Wyatt, Ibis, 322, 1871. 



^Sclater and Salvin, P. Z. S., p. 251, 1869; p. 627, 1868; Cabanis, Mus. Hein., 

 I, p. 16, 1850. 



./"Cabanis, Schomb. Guiana, III, p. ^m, 1848. 



fi'Quelch, Timehri, p. 262, 1896. 



/'Salvin, Ibis, p. 202, 1885. 



^Berlepsch and Hartert, Novit. Zool., IX, p. 10, 1902. 



