Perching Birds Chiefly Dull Colored. 



f/f- 



£33. 



634 



629, Blue-headed Vireo (Vireo solitarius). L. 5.5; 

 W. 2.9; B. .4. Ads. Lores and eye-ring white; crown 

 and cheeks bluish slate-color; back olive-green; below 

 white, sides washed with greenish yellow; two whitish 

 wing-bars. Notes. Resembling in form those of Red- 

 eyed or Yellow-throated Vireos but more varied, some- 

 times a continuous warble; a musical chatter, like that of 

 the Yellow-throated and a trilled whistle. (Torrey.) 



Range. — Eastern North America; breeds from Connecticut (and 

 south along Alleghanies) north to New Brunswick and Manitoba; 

 winters from Florida to Central America. 



629a. Cassin Vireo (K. s. cassini). Above wholly 

 plumbeous-gray with scarcely, if any, olive tinge; 

 below white, the sides gray faintly tinged with green- 

 ish yellow; size of No. 629c. 



Range. — "Breeds from British Columbia and Idaho south along Pa- 

 cific coast region end Nevada to Lower California; migrates to Arizo- 

 na, New Mexico, and northern Mexico." (Bailey.) 



629b. Plumbeous Vireo (V. s. plumbeus). Like 

 No. 629, but back washed with the color of the head; 

 white on breast and throat less pure. 



Range. — Rocky Mounain region; breeds from northern Mexico 

 north to southwestern Dakota and Wyoming; winters south to south- 

 ern Mexico. 



629c. Mountain Solitary Vireo (V. s. alticola). 

 Larger than No. 629, W. 3.15, B. .46; head darker, its 

 color extending over most of the back. 



Range. — Breeds in Alleghanies from North Carolina to Georgia; 

 winters in Florida. 



629d. St. Lucas Solitary Vireo (V. 5. lucasanus). 

 Smaller than No. 629a, but bill longer and stouter, 

 sides and flanks much yellower; young without 

 brownish below, and resembling young of No. 629. 



Range.— Cape Region of Lower California. 



633. Bell Vireo (Vireo bellii). L. 5. Above olive- 

 green, crown grayer; lores and eye-ring white; two in- 

 conspicuous whitish wing-bars; below white, sides 

 tinged with yellowish. Most like No. 627, but back 

 greener, no white line back of eye. Notes. Resemble 

 those of the White-eyed Vireo, but less harsh, song 

 less emphatic. (Goss.) 



Range. Interior states from Illinois west to Plains; breeds from 

 Texas to Minnesota; winters in Mexico. 



633.1. Least Vireo (Vireo pusillus). L. 4-8. Ads. 

 Above gray, slightly tinged with greenish toward rump; 

 bcrlo.v white, sides with little if any greenish tinge; 

 one inconspicuous whitish wing-bar; lores and eye- 

 ring inconspicuously grayish. 



Range, — Northwestern Mexico and northern Lower California; 

 breeds north to Arizona and middle California. 



634. Gray Vireo (Vireo vicinior). L. 5.5. Above 

 slaty gray; below white tinged with grayish; one in- 

 conspicuous wing-bar; lores and eye-ring gray; bill 

 short. Notes. Song may be compared with the finest 

 efforts of the Blue-headed Vireo with the added charm 

 and mellowness of the song of the Yellow-throated 

 Vireo. (Henshaw.) 



Range.— Northern Mexico, north to western Texas, southeastern 

 California, and southern Nevada; winters in Mexico. 



214 



