440 Birds of Colorado 



B. Tail dusky and bright yellow ; rest of the plumage yellow. 



D. aestiva, 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. TaU 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, 

 a^ Crown with an orange patch bordered by black stripes. 



S. aurocapillus, p. 461. 

 b^ Crown like the back, brown. S. n. notabilis, p. 462. 



c. Smallest — wing under 2*7o ; breast never white, spotted with 



black, 

 ai 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, 

 a* A complete white ring round the eye. 0. 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. 



c* Above grey, a concealed crown-patch of chestnut. 



V. virginise, p. 443. 



d^ Above dull olive-green with a concealed crown-patch 



of orange. V. celata, p. 444. 



b^ 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. 



