306 
Mr. O. Salvin^s Synopsis 
This well-known species is the only migratory member of 
the genus^ 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 of 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 shown by its presence at 
Mazatlan in winter, whereas it is unknown in Western 
North America during the summer. 
Its range in altitude during 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 pictay Sw. Zool. Ill. 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, Bev. 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 majoribus, 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 
