440 Birds of Colorado 
B. Tail dusky and bright yellow ; rest of the plumage yellow. 
D. estiva, p. 449, 
C. Tail with salmon-red or pale yellow at the base ; rest of plumage 
black or brown with salmon. S. ruticilla, p. 470. 
D. Tail dusky or olive, not marked or spotted. 
a. Large—wing at least 3-0; breast bright yellow. 
I. v. longicauda, p. 467. 
b. Smaller—wing 2-75 to 3-0; breast white, spotted with black. 
at Crown with an orange patch bordered by black stripes. 
S. aurocapillus, p. 461. 
bt Crown like the back, brown. S. n. notabilis, p. 462. 
ec. Smallest—wing under 2-75 ; breast never white, spotted with 
black. 
a! Bill acute and pointed, rictal bristles hardly evident. 
a? Crown slaty-blue, becoming olive-green on the back. 
a? Sides of the head and breast like the crown—slaty ; 
posteriorly yellow below. 
at Acomplete white ringround theeye. O. agilis, p. 462. 
b! <A white spot only above and below the eye. 
O. tolmiei, p. 463. 
b? Below whitish, no slaty or yellow. V. peregrina, p, 446. 
b? Crown and back olive-green ; forehead and sides of the 
head black’ G. t. occidentalis, p. 465. 
ce? Above grey, a concealed crown-patch of chestnut. 
V. virginiz, p. 443. 
d? Above dull olive-green with a concealed crown-patch 
of orange. V. celata, p. 444. 
bt Bill broad, flat and triangular, rictal bristles long and 
conspicuous. 
a, Breast yellow, spotted with black. 
W. canadensis, p. 470. 
b? Breast yellow but unspotted. 
a? Larger—wing 4-25; forehead bright yellow. 
W. p. pileolata, p. 468. 
b? Smaller—wing 4-15 ; forehead pale yellow. 
W. pusilla, p. 469. 
Genus MNIOTILTA. 
Bill rather long, about equal to the head, laterally compressed, 
with curved culmen and rather short rictal bristles; wing long and 
pointed, the three outer primaries about equal to one another ; tail 
even, distinctly shorter than the wing ; hind toe and claw very long ; 
plumage black and white. 
Only one species. 
