194 FIELD MUSEUM OF NATURAL HISTORY ZOOLOGY, VOL. IX. 



Top of head and back, rufous brown with more or less gray on 

 feathers; sides, without spots; tail feathers, narrow; tail much 

 rounded, the outer feathers being half an inch or more shorter than the 

 middle feathers. Aimophila astivalis bachmanii. 



Bachman's Sparrow. 

 See No. 266. 



PART 4. The following species have the breast not streaked (in the 

 adult); carpal joint (bend of wing), not edged with yellow: 



Wing coverts and secondaries, edged with rufous brown; flanks, 

 brownish olive. Melospiza georgiana. 



Swamp Sparrow. 

 See No. 269. 



Wing coverts and secondaries, edged with pale tawny buff; tail 

 feathers, brown, narrowly edged with brownish white; flanks, pale 

 buffy white. Spizella pallida. 



Clay-colored Sparrow. 

 See No. 261. 



GROUP 3. Wing, 2.37 to 2.75 inches long. 



PART 1. The following species have the throat or under parts more 

 or less marked with either blue, red, dull green, or bright yellow: 



