80 
Synopsis of the Birds 
Yellow-throated Warbler , Sylvia flavicollis , Wils. Am. 
Orn. ii. p. 54. pi. 12. 6. 
Inhabits the northern parts of the United States during 
summer : extremely rare as far north as Pennsylvania : win- 
ters in the West Indies. 
111. Sylvia virens. Lath. Yellowish-green ; front, cheeks, 
sides of the neck, and line over the eye, yellow ; beneath 
white ; throat black ; wings bifasciate with white, and with 
the tail, dusky ; three lateral tail feathers marked with white. 
Black-throated green Warbler , Sylvia virens , Wils . Am. 
Orn. ii. p. 127. pi. 17 .fig. 3. 
Inhabits the United States during summer; in Pennsyl- 
vania a few days only in the spring on their way northward, 
and in the autumn on their return ; rather rare. 
112. Sylvia blackburnije, Lath. Head striped with black 
and orange ; throat and breast orange, bounded by black 
spots ; wings with a large white spot ; three lateral tail 
feathers white on the inner web. 
Blackburnian Warbler , Sylvia Blackburnice, Wils. Am. 
Orn. Hi. p. 64. pi. 28. fig. 3. 
Inhabits the United States during summer ; for a few days 
only in the spring and autumn in Pennsylvania: rare. 
113. Sylvia icterocephala, Lath. Crown yellow; beneath 
white ; sides, from the bill, chesnut ; wings bifasciate with 
yellow ; three lateral tail feathers marked with white. 
Female destitute of chesnut on the sides. 
Chesnut-sided Warbler , Sylvia Pennsylvania, Wils. Am. 
Orn. i. p. 99. pi. 14. fig. 5. 
Inhabits the United States during summer ; a few days 
only in Pennsylvania in spring and autumn : rare. 
114. Sylvia castane a, Wils. Forehead and cheeks black; 
crown, throat, and sides under the wings, chesnut; wings 
bifasciate with white ; three lateral tail feathers marked with 
white. 
