BIBDS OP NORTH AND MIDDLE AMERICA. 



205 



ing two more or less distinct) bands (more or less obsolete in worn 

 plumage); narrow orbital ring (interrupted at each angle of eye) and 

 supraloral streak dull white; auricular and suborbital regions pale 

 grayish brown or brownish gray; a dusky mark at anterior angle 

 of eye; median under parts dull white, more or less tinged with buffy 

 yellowish, especially on chest, the sides and iianks light olive-yellow; 

 under tail-coverts and axillars pale sulphur yellow; under wing-coverts 

 yellowish white; inner webs of remiges edged with dull yellowish white; 

 maxilla horn brownish, darker terminally ; mandible paler brownish (in 

 dried skins); iris brown; legs and feet dusky horn color (bluish gray 

 in life?). 



Young. — Much like adults, but pileum and hindneck soft drab, back 

 and scapulars dark drab, under parts nearly pure white, with sides, 

 flanks, and under tail-coverts tinged with sulphur yellow, wing-bands 

 more distinct, and tertials edged with yellowish white or pale sulphur 

 yellow. 



Adult mafe.— Length (skins), 97-113 (106.8); wing, 52-58.6 (55.6); 

 tail, 41.5-46.5 (44.7); exposed culmen, 9-10 (9.8); tarsus, 18-19 (18.6); 

 middle toe, 9.5-10.5 (9.9)." 



Adult female.— Ijength (skins), 100-109 (104); wing, 53-56.5 (55.1); 

 tail, 44-47 (45.4); exposed culmen, 9-10 (9.9); tarsus, 18-19.5 (18.9); 

 middle toe, 9.5-11 (9.9).* 



Prairie districts of Mississippi Valley, from South Dakota, southern 

 Minnesota, Iowa, northern Illinois, and northwestern Indiana south- 

 ward to eastern Texas and northern Tamaulipas (Mier; Guerrero); in 

 winter southward over greater part of Mexico, as far as States of 

 Oaxaca (Tehuantepec City; Santa Efigenia), Guerrero (Acapulco), and 

 Jalisco; accidental in Massachusetts. 



Vireo bellii Audubon, Birds Am., oct. ed., vii, 1844, 333, pi. 485 (Fort Union, 

 Dakota; type in coll. U. S. Nat. Mus.). — Cassin, Proc. Ac. Nat. Sci. Phila., 

 1851, 150. — WooDHOusE, in Eep. Sitgreaves' Expl. Zufii and Col. R., 1853, 

 76 (Texas).— Hoy, Ann. Eep. Smithson. Inst, for 1864 (1865), 437 (Mis- 

 souri). — ScLATBR, Cat. Am. Birds, 1862, 42 (Missouri). — Baird, Review Am. 

 Birds, 1866, 358 (localities in Kansas, Arkansas, and Texas). — Coues, Check 



«■ Fifteen specimens. 



* Seven specimens. 



Adult males from different localities average, respectively, as follows: 



