«IRDS OF NORTH AND MIDDLE AMERICA. 207 



of back, otc, o-niyer; under parts whiter, witli oliNc-vdlow oi" sides 

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

 white, or very pale sulphur yellow. 



Ad'flf /Jtal'.—Jjength (skins), 100-112 (105.8); wing, 53-55.5 (54.2); 

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

 middle toe, 9.5-10 (9.7)." 



A(h(/tfei/i<dc. -l^cm^th (skins), lOO-llo (lo5); wing, 58.5-56 (54.5); 

 tail, 45-48 (46.5); exposed culmen. 9.5-10 (i).8): tarsus, 18.5-19 (18.7); 

 middle toe, 9.5-10 (9.7).'' 



South^^ estcrn Texas, in Presidio, Brewster, and KImiicv counties, 

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

 and Guanajuato. 



Vireo hellii (not of Audubon) Amekicax Ornitii()i-o(;ists' Inion, Check List, 

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

 counties, w. Texas, breeding). — Bailey (Florence I\L), Tlandb. Binls AV. 

 U. S., 1902, 399, imrt. 



l^[ireo] hclJII Ru)GWAY, Man. N. Am. Birds, 1887, 476, part. 



Vireo belli Baird, Rep. U. S. and Mex. Bound. Surv., ii, pt. 2, ls.^9, 12 ( \v. 

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



\'lrt'o hellii itiediiix Oberiiolsek, Proc. Biol. Soc. Wash., xvi, Feb. 21, 1903, '7 

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



VIREO BELLII ARIZON^^, new subspecies.'' 

 ARIZONA VIREO. 



Similar to V. h. uKdhis, hut still paler and grayer, the l)ack and 

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

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

 decidedly longer. Young with under parts pure white, the sides, 

 Hanks and under tail-coverts tinged Avith pale sulphur or ])rimrose 

 yellow; pileum and hindneck light pinkish gray, approaching ecrti 

 drab; back and scapulars vinaceous-drab. 



Adidtmale.—'LQngih (skins), 10^115 (107.1); wing, 53.5-57 (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.— Ijengih (skins), 103-110 (107.8); wing. 53-57 (54.7); 

 tail. 49-51.5 (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 Hancoi'k). and southward 

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

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



"Six specimens. 

 ''Three specimens. 



'■Type no. 98790, coll. U. S. Nat. ^[us.. adult male, Tucson, Arizona, Mar. 21, iSS4; 

 v.. W. Nelson. 

 ''Ten specimens. 



