324 Birds of Colorado 
ce. 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. 
at Black with white wing-patch. 
Calamospiza (male), p. 406. 
bt Male blue, with chestnut wing-band, female plain 
brown; length over 6. Guiraca, p. 401. 
ec! 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. 
? 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. 
Pocecetes, p. 354. 
ce No white or chestnut on wing. 
aS Hdge of wing faint yellow, wings longer, exceed- 
ing tail and tarsus together. 
Passerculus, p. 356. 
b® Edge of wing bright yellow; wings shorter, 
about equal to tail and tarsus together. 
Ammodramus, p. 359. 
e& 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. 
e® No yellow; white bar on wing, throat black in 
male. Passer, p. 348. 
