ORDER PASSERES. 299 
[Vireosylva flavoviridis Cassin. Yellow-green Vireo. [625.] 
Vireosylvia flavoviridis Cassin, Proc. Acad. Nat. Sci. Phila., V, 1851, 152. 
(Panama.) 
Rance.— Tamaulipas, Nuevo Leon, and Sinaloa, south to South 
America; accidental at Brownsville, Texas, Riverside, California and 
Godbout, Quebec. ] 
Vireosylva philadélphica Cassin. Philadelphia Vireo. [626.] 
Vireosylvia philadelphica Cassin, Proe. Acad. Nat. Sci. Phila., V, 1851, 
153, pl. 10, fig. 2. (Near Philadelphia, Pa.) 
RancE.— Eastern North America. Breeds in Canadian Zone 
from northern and central Alberta, northern Manitoba, northern 
Ontario, New Brunswick, and Maine to northern Michigan and New 
Hampshire; winters from Cozumel Island and Guatemala to Veragua. 
Vireosylva gilva (VIEILLOT). 
Rance.— Temperate North America, south in winter to Guatemala. 
a. Vireosylva gilva gilva (Vie1tLoT). Warbling Vireo. [627.] 
Muscicapa gilva Viertitot, Ois. Amer. Sept., I, 1807 (1808), 65, pl. 34. 
(Middle United States, particularly New York.) 
Rance.— Eastern North America. Breeds in Transition and Austral zones 
from southeastern Alberta, northern Manitoba, central Ontario, and Nova 
Scotia south to northwestern Texas, southern Louisiana, North Carolina, and 
Virginia; winter home unknown, but south of the United States. 
b. Vireosylva gilva swainsoni (Bairp). Western Warbling Vireo. [627a.] 
Vireo swainsonit Bairp, Rep. Expl. & Surv. R. R. Pac., IX, 1858, 336. 
(Petaluma, California.) 
Rance.— Western North America. Breeds in Canadian, Transition, and 
Upper Austral zones from southern British Columbia, southwestern Mackenzie, 
and northeastern Alberta south to southern Lower California, northern Sonora, 
Arizona, New Mexico, and western Texas, and east to western South Dakota 
and northwestern Nebraska; winters south to Guatemala. 
