VIREO. 477 



greenish posteriorly ; beneath decidedly tinged later- 

 ally with olive-yellow; wing-bands narrow, tinged 

 with olive-yellow ; length 4.25-4.75, wing 2.40-2.45 

 (2.43), tail 2.00-2.10 (2.06), bill from nostril .26-.29 

 (.28), tarsus .72-.7G (.75). Hab. California (resident). 

 632. V. huttoni CASS. Button's Vireo. 



/ 2 . Paler and grayer, with longer wings and tail and 



(usually) more slender bill ; above olive-gray, tinged 



with olive-green posteriorly ; beneath very faintly 



tinged laterally with olive-yellowish ; wing-bands 



broader, pure white; length 4.90-5.20, wing 2.50-2.65 



(2.58), tail 2.10-2.20 (2.16), bill from nostril .25-.30 



(.28), tarsus .70-.75 (.72). Hab. Mexico, western 



Texas, New Mexico, Arizona, and Lower California. 



632a. V. huttoni Stephens! BREWST. 



Stephens's Vireo. 



c 1 . Sides (from ear-coverts to flanks, inclusive) light tawny. 



Above light brown, becoming more tawny on forehead, the sec- 

 ondaries, primaries, and tail-feathers edged with pale olive; 

 two bands across wing, and edges of tertials, white ; lores, 

 orbits, and median lower parts white ; wing about 2.50, tail 

 about 2.15. Hab. Island of Cozumel, Yucatan. 



V. bairdi KIDGW. Baird's Vireo. 1 

 6 2 . "Wing not much longer than tail (the difference less than length of exDOsed 



culmen). 

 c 1 . Lower parts white 'usually more or less tinged with grayish or olive 



laterally). 

 d 1 . Wing less than 2.50, tail less than 2.25. 



e l . Middle wing-coverts not distinctly, if at all, tipped with white; 

 bill from nostril less than .30. 



Above plain gray, more or less tinged with olive-green- 

 ish posteriorly (sometimes on back also) ; greater wing- 

 coverts (sometimes middle coverts also) narrowly, and 

 not very distinctly or abruptly, tipped with white ; a 

 rather indistinct supraloral streak and orbital ring 

 grayish white, the lower portion of lores (from bill to 

 eye) grayish or dusky; lower parts white, the sides 

 and flanks tinged, more or less strongly, with olive- 

 grayish and pale yellow; length 4.80-5.25, wing 2.10- 

 2.30 (2.17), tail 2.03-2.20 (2.09), bill from nostril .25- 

 .29 (.27), tarsus .70-.80 (.72). Nest in bushes, in 

 thickets. Eggs .67 X -48. Hab. Southern and central 



1 Vireo bairdi RIDGW., Descr. New Sp. B. Cozumel, Feb. 26, 1885, 2 ; Proc. U. S. Nat. Mus. viii. 1885, 

 565. 



