324 Birds of Colorado 



c. Claws normal, not enlarged, 

 a* Length over 7-5. 



a* Tail longer than wing ; plumage plain brown, or 

 black, white and chestnut. Pipilo (in part), p. 392. 

 b' Tail shorter than the wing ; male rose or orange on 

 breast, female yellow on under wing-coverts. 



Zamelodia, p. 398. 

 b* Length less than 7-5. 



a' Colour greenish ; crown chestnut. Oreospiza, p. 396. 

 b' Colour not green ; not extensively streaked, 

 a* Black with white wing-patch. 



Calamospiza (male), p. 406. 

 b* Male blue, with chestnut wing-band, female plain 

 brown; length over 6. Guiraca, p. 401. 



c* Male blue, with rufous and white, female brown ; 

 length under 6. Passerina, p. 403. 



d* Slaty or ashy ; outer tail-feathers white. Junco, p. 373. 

 e* Grey ; throat and tail black with white edges. 



Amphispiza (in part), p. 381. 

 c' Colour not greenish ; extensively streaked, 

 a* Inner secondaries lengthened. 



a^ A large white or buffy-white wing-patch. 



Calamospiza (female), p. 406. 

 b' Bend of wing chestnut, outer tail-feathers white. 



Pooecetes, p. 354. 

 c^ No white or chestnut on wing. 



a* Edge of wing faint yellow, wings longer, exceed- 

 ing tail and tarsias together. 



Passerculus, p. 3i56. 

 b* Edge of wing bright yellow ; wings shorter, 

 about equal to tail and tarsus together. 



Ammodramus, p. 359. 



c® Edge of wing white, wing short, hardly equal to 



tail and tarsus together. Centronyx, p. 358. 



b* Inner secondaries not lengthened ; wing decidedly 



longer than tail. 



a^ Yellow on breast, edge of wing and eyebrow ; 



throat-patch black. Spiza, p. 405. 



b^ No yellow ; head with black, white and chestnut ; 



tail black, tipped with white. 



Chondestes, p. 361. 



c^ No yellow ; white bar on wing, throat black in 



male. Passer, p. 348. 



