426 VIREOS 
The YELLOW-GREEN ViREO (625. Vireosylva flavoviridis flavoviridis), a 
Mexican and Central American species, has been once recorded from God- 
bout, Province of Quebec. 
626. Vireosylva philadelphica Cass. PHILADELPHIA VIREO. Ads.— 
Upperparts light olive-green; the crown sometimes grayish; a whitish line 
over the eye; wings and tail edged with olive-green; no wing-bars; first 
primary nearly as long as second; entire underparts nearly uniform pale, 
greenish yellow. L., 4°75; W., 2°60; T., 1°95; B. from N., °26. 
Remarks.—The pale, greenish yellow color spread almost uniformly over 
the entire underparts distinguishes this bird from our other Vireos. 
Range.—E. N. Am. Breeds in Canadian zone from n. and cen. Alberta, 
n. Man., n. Ont., N. B., and Maine, to n. Mich. and N. H.; winters from 
Cozumel Is. and Guatemala to Veragua. a 
Washington, very rare T. V., May; Sept. Ossining, rare T. V., Sept. 
20-Oct. 20. Cambridge, rare T. V. Glen Ellyn, rather rare T. V., May 14, 
15; Aug. 21-Sept. 30. SE. Minn., uncommon T. V., May 9. 
Nest, pensile, of fine grass and birch bark, suspended from a forked branch 
about eight feet from the ground. Eggs, 4, similar in color to those of V. 
olivacea (Seton). Date, Duck Mt., Man., June 4. 
This species resembles the Red-eyed Vireo in habits, and Mr. Brew- 
ster writes that its song is so nearly identical with the song of that spe- 
cies ‘that the most critical ear will, in many cases, find great difficulty 
in distinguishing. between the two. The notes of philadelphicus are 
generally pitched a little higher in the scale, while many of the utter- 
ances are feebler and the whole strain is a trifle more disconnected. 
But these differences are of a very subtile character, and, like most 
comparative ones, they are not to be depended upon unless the two 
species can be heard together. The Philadelphia Vireo has, however, 
one note which seems to be peculiarly its own, a very abrupt, double- 
syllabled utterance with a rising inflection, which comes in with the 
general song at irregular but not infrequent intervals. I have also on 
one or two occasions heard the male when in pursuit of his mate utter 
a soft pseuo, similar to that sometimes used by Vireo olivaceus, and 
both sexes when excited or angry have a harsh, petulant note exactly 
like that of V. giluus” (Bull. Nutt. Orn. Club., V, 1880, p. 5). 
1897. Dwieut, J. D., Jn., Auk, XIV, 259-272 (biography). 
627. Vireosylva gilva gilva (Vieill.). WarBLine VirEo. Ads.—Upper- 
parts ashy olive-green ; no wing-bars; wings and tail edged with the color of the 
back; first primary very short, not more than 1°00 in length; underparts white 
slightly washed with yellowish. L., 5°80; W., 2°85; T., 2°14; B. from N., °30. 
Range.—E. N. Am. Breeds in Transition and Austral zones from se. 
Alberta, n. Man., cen. Ont., and N.S. s. to nw. Tex., s. La., N. C., and Va.; 
winter home unknown, but s. of the U. 8. 
Washington, rather common S. R., Apl. 21-Sept. 12. Ossining, tolerably 
cally common 8. R., May 
5-Sept. 15. N.Ohio, abun- 
. R., May 1-Sept. 15. SE. 
Fig, 113, Wing of Warbling Vireo, to show Minn., common S. R., May 
; common, S. R., May 3- 
SS dant §.R., Apl. 17-Gct. 10. 
short first primary. 8-Sept. 15, 
at Sept. 18. Cambridge, lo- 
=e + Glen Ellyn, not common S. 
