420 
NORTH AMERICAN BIRDS. 
otherwise grayish, but tinged with brownish or buffy in win- 
ter; sides of breast with a rusty spot; lower parts whitish, 
tinged with grayish or buffy, or both, anteriorly; bill red- 
dish cinnamon. Young: Essentially like adult, but colors 
duller and more suffused, markings of head much less dis. 
tinct, and lower parts, especially breast, streaked with dusky.) 
e. Color much more rusty above, with median grayish crown. 
stripe usually very narrow and indistinct (sometimes obso- 
lete), and wings and tail shorter; length 5.10-6.00, wing 
2.45-2.70, tail 2.50-2.80. Nest on or near ground in old 
weed-grown fields, thickets, etc., composed mainly of 
slender dry grass-stems. Higgs 3-5, .68 x .51, white, green- 
ish white, or buffy white, speckled with reddish brown. 
Hab. Hastern United States and southern Canada, west 
to edge of Great Plains (eastern Nebraska, Fort Smith, 
Arkansas, eastern Texas, etc.). 
563. S. pusilla (Wits.). Field Sparrow. 
e*, Color much less rusty above, with median grayish crown-stripe 
always (?) broad and very distinct, the lateral crown-stripes 
and postocular streak much paler and less rusty brown, 
back pale grayish buffy, more narrowly streaked with black 
and slightly tinged or mixed with rusty, and wings and tail 
longer; length about 5.80-6.10, wing 2.60-2.80, tail 2.80- 
3.10. Hab. Great Plains, from southern Texas (Laredo, 
etc.) north to Wyoming Territory and western Nebraska. 
563a. S. pusilla arenacea Cuaps. Western Field Sparrow.’ 
@. Upper parts without any rusty, and top of head and hind-neck dis- 
tinctly streaked with dusky. 
é. Head distinctly striped; ear-coverts light buffy brown, in 
marked contrast with the very distinct broad superciliary 
and malar stripes of dull whitish, and ashy of sides of neck. 
Adult: Top of head pale raw-umber brown, broadly 
streaked with black and divided by a distinct median 
stripe of light brownish gray; light brown ear-coverts 
bordered above by a very distinct postocular streak of 
dark brown or dusky, and along lower edge by a rictal 
streak of the same; whitish malar streak usually bordered 
below by a more or less distinct grayish or brownish 
streak along each side of throat; hind-neck and sides of 
neck ashy, in more or less marked contrast with brown of 
ear-coverts and crown; back light brown, broadly streaked 
with black. (Jn winter, the colors much browner, obscuring 
gray of neck and strongly tingeing chest and sides.) Young: 
1 Spizella pusilla arenacea CHADBOURNE, Auk, iii. April, 1886, 248, 
