BIRDS OP NORTH AND MIDDLE AMERICA. 207 



of back, etc., grayer; under parts whiter, with olive-yellow of sides 

 and flanks much paler; under tail-coverts and axillars white, yellowish 

 white, or very pale sulphur yellow. 



Advlt mal<.'.~~'Length (skins), 100-112 (106.8); wing, 53-65.5 (54.2); 

 tail, 45-47 (46.2); exposed culmen, 9-10 (9.6); tarsus, 18-19 (18.7); 

 middle toe, 9.6-10 (9.7).« 



Adult female.— Length (skins), 100-110 (105); wing, 53.5-56 (54.5); 

 tail, 45-48 (46.5); exposed culmen, 9.6-10 (9.8); tarsus, 18.5-19 (18.7); 

 middle toe, 9.5-10 (9.7).' 



Southwestern Texas, in Presidio, Brewster, and Kinney counties, 

 and southward into central Mexico, in States of Coahuila (Monclova) 

 and Guanajuato. 



Vireo hellii (not of Audubon) American Oknithologists' TJ^jion, Check List, 

 1886, no. 633, part.— (?) Lloyd, Auk, iv, 1887, 295 (Concho and Tom Green 

 counties, w. Texas, breeding). — Bailey (Florence M. ), Handb. Birds W. 

 V. S., 1902, 399, part. 



V[ireo] hellii Ridgway, Man. N. Am. Birds, 1887, 476, part. 



Vireo belli Baikd, Rep. U. S. and Mex. Bound. Surv., ii, pt. 2, 1859, 12 (w. 

 Texas).— Cooke, Bird Migr. Miss. Val., 1888, 237, part. 



Vireo hellii, medius Obeei-iolser, Proc. Biol. Soc. A^'ash., xvi, Feb. 21, 1903, 17 

 (Boquillas, s. w. Texas; coll. TJ. S. Nat. Mus. ). 



VIREO BELLII ARIZON.ffi;, new subspecies, c 

 ARIZONA VIREO. 



Similar to Y. b. med/'uK, but still paler and grayer, the back and 

 scapulars brownish gray, like pileum and hindneck, the sides and 

 flanks faintly washed with more grayish olive-yellow; tail and tarsus 

 decidedlj^ longer. Young with under parts pure white, the sides, 

 flanks and under tail-coverts tinged with pale sulphur or primrose 

 yellow; pileum and hindneck light pinkish gray, approaching ecru 

 drab; back and scapulars vinaceous-drab. 



Adult inale.--Length (skins), 104-115 (107.1); wing, 63.5-57 (54.4); 

 tail, 48-54 (50.2); exposed culmen, 9-10 (9.6); tarsus, 18.5-20 (19.4); 

 middle toe, 9.5-10.5 (10.1).'^ 



Adult female.— Length (skins), 103-110 (107.8); wing, 53-67 (54.7); 

 tail, 49-51.6 (49.9); exposed culmen, 9-10 (9.6); tarsus 18..5-20 (19.1); 

 middle toe, 9.5-10 (9.9).«' 



Arizona to western Texas (El Paso; Fort Hancock), and southward 

 into northwestern Mexico, in States of Chihuahua (Casas Grandes, 

 May 29), Sonora, and Sinaloa (near Mazatlan, March 31). 



a Sis specimens. 

 ''Three specimens. 



«Type no. 98790, coll. U. S. Nat. Mus., adult male, Tucson, Arizona, Mar. 21, 1884; 

 E. W. Nelson. 

 ''Ten specimens. 



