PASSERELLA. 433 



brown in winter and more or less stained with yellowish in imma- 

 ture birds. Young : Above heavily streaked with blackish, the an- 

 terior and lateral lower parts also distinctly streaked. Length 5.25- 

 6.00, wing about 2.30-2.50, tail 2.40-2.70. Eggs .76 X -56, pale bluish 

 green or greenish white, coarsely spotted or blotched with brown 

 ' (rarely speckled). Sab. Eastern North America, breeding from 

 northern United States north to Newfoundland, Labrador, and Fort 

 Simpson ; west to edge of Great Plains, casually to Utah. 



584. M. georgiana (Lath.). Swamp Sparrow. 

 a 2 . First quill longer than sixth ; malar stripe and broad band across chest buff, the 

 latter narrowly streaked with black. 

 Adult: Top of head hazel-brown sharply streaked with black and di- 

 vided by a median grayish line ; back olive-grayish or brown, sharply 

 streaked with black. Young : Not essentially different from adult, but 

 colors more suffused and with streaks less sharply denned. Length 

 5.25-6.00, wing 2.30-2.65, tail 2.30-3.00. Eggs .77 X -57, dull whitish, 

 greenish white, or (usually) brownish white or pale brownish, marked 

 like those of M. georgiana. Sab. "Whole of North America, breeding 

 from northern border of United States northward, and south along 

 higher mountain ranges... 583. M. lincolni (Aud.). Lincoln's Sparrow. 



Genus PASSERELLA Swainson. (Page 384, pi. CX., figs. 3, 5.) 



Species. 



Common Characters. — Above brownish gray, brownish, or rusty, the upper 

 tail-coverts, tail, and wings usually much more rufescent than other portions ; the 

 back (sometimes top of head also) sometimes streaked with rusty ; lower parts 

 white, more or less thickly marked with triangular spots of brown, rusty, or dusky, 

 especially on chest (where these spots are sometimes united into a more or less 

 conspicuous patch, as also on sides of throat), the sides and flanks striped or broadly 

 streaked with the same color. Young not materially different from adults. West 

 on ground, or near ground in bushes. Eggs 3-5, pale bluish green, dull brownish 

 white, or light brownish, speckled, spotted, or blotched with brown (sometimes 

 nearly uniform chocolate-brown). 



a 1 . Wing longer than tail ; spots on chest larger, more blended. 



ft 1 . Upper parts mixed deep rusty and brownish gray, in variable proportion ; 

 if grayish predominating, the back (sometimes top of head also) streaked 

 with rusty; wing-coverts usually narrowly tipped with whitish, pro- 

 ducing two more or less distinct bars ; markings on lower parts chiefly 

 (or entirely) deep rusty; length 6.20-7.50, wing 3.30-3.70 (3.50), tail 

 2.80-3.15 (3.02), exposed culmen .43-.47 (.45), depth of bill .30-.33 (.32), 

 tarsus .97-1.04 (1.01), hind-claw .38-.43 (.39). Eggs .91 X -63, the deep 

 brownish style very frequent. Sab. Northern North America, breeding 

 from Gulf of St. Lawrence and Labrador to Alaska (everywhere north 



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