250 



KEY TO THE BIKUS OF EASTERN NOIITII AJIEEICA. 



Shoulder (lesser wing coverts), rufous brown; at least half of outer tail 

 feathers, white ; back, streaked. 



Vesper Sparrow. 



Foocates graminens. 

 See 'So. 408. 



Back, tinged with rufous brown, and 

 streaked with black ; carpal joint (bend 



of wing), edged with pale yellow; tail, 

 over 2.50 ; usually au indication of yellow 

 in front of the eye ; no white ou tail 

 feathers . 



White=throated Sparrow. 



Zonotrichla alhicollis. 

 See No. 423. 



Bill, sharp; tail, under 2 inches; entire 

 upper plumage, olive buff, streaked 

 with black ; under plumage, bufly 

 white, or ashy white, heavilj' streaked 

 with black; more or less yellow on 

 edge and base of wing feathers, and 



base of tail feathers. 



Pine Siskin. Pine Finch. 



Spimis pimis. 



See No. 402. 



Crown and back, dull brown, without 

 streaks ; undcrparts, brownish, whitish 

 on belly; breast streaks, not very pro- 

 nounced, often indistinct (female). 



Indigo Bird. Indigo Bunting. 

 Fasseriiia eyanea. 



See No. 446. 



Fine iflnch. 



