424 VIREOS 
e. Kans., s. Ills, Ky., w. N. C., and interior of Va. (locally in the East); 
winters from the Middle States and s. New England to Tex., La., and Miss. 
Washington, rare W. V., Aug. 11-Apl. = may summer. Ossining, casual. 
Cambridge, one record, (Nov. 9, 1892). N. Ohio, tolerably common S. R., 
Mch. 10-Nov. 1. Glen Ellyn, fairly common §. R., Mch. 2-Sept. 29. SE. 
Minn., common 8S. R. Mch. 15—Oct. 28. 
Nesting date, Auburn, N. Y., May 11; se. Minn., Apl. 7. 
57. FamMIty VIREONIDE. ViIREOS. (Fig. 69.) 
The Vireos, numbering about one hundred species and subspecies, 
are peculiar to America. Most of them are confined to tropical America, 
only eleven species reaching the United States where, except along our 
southern boundaries, they are ‘migratory. 
Vireos are for the most part arboreal, though several species haunt 
the lower, rather than the higher growth. For small, insect-eating birds 
they are rather slow in their movements. We do not see them darting 
out after insects as do the Flycatchers, nor do they flit through the 
foliage after the manner of many Warblers, but patiently glean their 
food from the under surfaces of leaves, crevices in the bark, etc. They 
are more musical than the small Warblers; all our species have pleasing 
songs, and some of them are especially gifted. Their nests are neatly 
constructed cups suspended from the arms of a forked branch, 
KEY TO THE SPECIES 
A. With distinct #hite or yellowish white wing-bars. 
a. Eye-ring, or line from eye to bill, yellow. 
a, Throat and breast bright yellow; map gray. 
628. YELLOW-THROATED VIREO. 
a’, Underparts | white or whitish; sides and sometimes breast washed 
with greenish yellow; rump olive-green. 
631. WHITE-EYED VirEO. 63la. Kmy Wrst ViRxEo. 
b. Eye-ring and line from eye to bill white. 
b!. Head lead-blue; wing over 2°50. 
29. BLUE-HEADED VirEO. 629a. MounraIn VIREO. 
b2. Head grayish, nearly like back; wing under 2°50. 
633. BEeLu’s VrrEo (Illinois). 
B. Without white wing-bars. 
a. Underparts yellowish; first primary as long as fifth. 
626. PHILADELPHIA VIREO. 
b. Underparts white; sides washed with olowst first primary ‘75 long. 
627. WarBLING VIREO. 
Cc. UnSarane white, with little if any yellowish on sides; head with a 
lead-gray op bordered by narrow black lines over the eye. 
. RED-EYED VIREO. 623. BLACK-WHISKERED VIREO. 
623. Vireosylva calidris barbatula (Cab.). BLAcK-WHISKERED 
Vireo, Ads.—Similar to the next species, but somewhat duller above and 
with a fuscous streak on either side of the throat. 
Range.—S. Fla. (as far n. as Anclote Keys), Key West, Dry Tortugas, 
Cuba, Little Cayman, and the Bahamas. 
M est, pensile, of dry grasses shreds of bark, cotton, lichens, and spiders’ 
webs, lined with soft, cottonlike fibers, suspended from a forked branch, 
5-20 feet up. Eggs, 344, white, with a "pinkish hue, speckled and spotted, 
