306 Mr. O. Salvin's Synopsis 



This well-known species is the only migratory member of 

 the genus J residing in the United States in summer, where 

 it breeds, and passing the autumn and winter months 

 within the tropics. During the latter season it has been 

 observed in most of the "West-India islands, the Bahamas, 

 Cuba, Jamaica, St. Domingo, St. Thomas, St. Croix, and 

 Trinidad; and its range on the continent extends south- 

 wards to about the line of the equator. In Guatemala, 

 where I observed it, birds made their appearance about 

 the beginning of September and remained in the country 

 till the middle o£ March. 



The line of the southward migration of the species tends 

 rather to the westward, and thus follows the course of many 

 other migratory species. This is shoAvn by its presence at 

 Mazatlan in winter, whereas it is unknown in Western 

 North America during the summer. 



Its range in altitude duriug the winter is great ; for I 

 found it at the sea-level both on the Atlantic and Pacific 

 sides of Guatemala, and as high as 8000 ft. in the mountains 

 of the interior. 



As seems to be the case with migratory species in general, 

 little or no variation is noticeable in individuals of Setophaga 

 ruticilla. Tendencies to vary seem kept in check by the 

 intermingling of individuals during the great annual move- 

 ment of the species. 



2. Setophaga picta. 



Setophaga pict a, Sw. Zool. 111. ser. 2, i. pi. 3 ; Scl. P. Z. S. 

 1856, p. 292, 1858, p. 299, & 1859, p. 374; Scl. & Salv. Ibis, 

 1859, p. 12; Baird, Rev. Am. B. p. 256; Lawr. Mem. Bost. 

 Soc. N. H. ii. p. 270, et Bull. U.S. Nat. Mus. no. 4, p. 16 ; 

 Scl. & Salv. Nomencl. p. 10 ; Henshaw, Wheeler's Exp. Zool. 

 v. p. 209. 



Muscicapa leucomus, Giraud, B. Texas, pi. 6. f. 1 ; Scl. 

 P. Z. S. 1855, p. 66. 



Mas nitenti-niger ; macula supra et infra oculos, tectricibus 

 alarum mediis et raajoribus, secundariorum marginibus, 

 subalaribus, ventre imo et crisso albis ; abdomine medio 

 coccineo ; rectrice extima utrinque fere omnino alba, 

 proximse parte basali nigra, tertia albo terminata, reliquis 



