AMMODB.AMUS. 413 



sides of the crown chiefly of the latter color ; lower parts entirely- 

 buff, streaked on chest with dusky.) 



d 1 . Colors of upper part usually not sharply contrasted ; chest often 

 nearly white, and frequently with the streaks dusky, or black- 

 ish, and very sharply defined ; length 4.80-5.85. Male : Wing 

 2.17-2.36 (2.27), tail 1.90-2.25 (2.06), culmen .53-.59 (.57), depth 

 of bill at base .23-.27 (.25), tarsus .86-.91 (.89). Female : Wing 

 2.18-2.42 (2.23), tail 1.90-2.13 (1.98), culmen .53-.58 (.56), depth 

 of bill at base .23-.26 (.24), tarsus ,85-.87 (.86). Eggs .76 x 

 .57, brownish white, finely speckled or sprinkled with dull rusty 

 brown. Sab. Salt marshes of Atlantic coast, from Prince 

 Edward Island and Nova Scotia to North Carolina. 



549. A. caudacutus (Gmel.). Sharp-tailed Sparrow. 



d 1 . Colors of upper parts usually very sharply contrasted, especially 

 the chalky white streaks of back, as compared with the rich 

 umber-brown ground-color ; chest and sides usually very deep 

 buff or ochraceous, never (?) very distinctly or sharply streaked 

 with dusky. Male: Wing 2.12-2.33 (2.24), tail 1.98-2.21 

 (2.07), culmen .49-.53 (.51), depth of bill at base .23-.26 (.25), 

 tarsus .80-.87 (.84). Female: Wing 2.15-2.20 (2.18), tail 1.83- 

 2.09 (1.99), culmen .50-.52 (.51), depth of bill at base .23-.26 

 (.25), tarsus .82-.8S (.83). Sab. Fresh-water marshes of east- 

 ern United States, chiefly in Mississippi Valley; east during 

 migrations to marshes of Atlantic coast (Massachusetts to 



South Carolina) 549rt. A. caudacutus nelsoni Allen. 



Nelson's Sparrow. 

 Edge of wing and supraloral streak yellow ; no distinct superciliary 

 stripe ; malar stripe whitish. 



d 1 . Above nearly plain olivaceous, tinged with ashy, the wings and 

 tail more brownish; beneath grayish white, the chest streaked 

 with dull grayish. Young : Crown and back broadly streaked 

 with black ; lower parts buffy white, the chest and sides streaked 

 with dusky. Length about 5.25-6.00, wing 2.40-2.55, tail 2.10- 

 2.25, culmen .60-.67, tarsus .90-.95. Eggs .80 X -62, greenish 

 white or brownish white, coarsely speckled with umber-brown. 

 Sab. Salt marshes of Atlantic and Gulf coasts, from Massachu- 

 setts to Texas.. 550. A. maritimus (Wils.). Seaside Sparrow. 



d 2 . Above black, indistinctly streaked with olive and grayish ; beneath 

 white, broadly streaked on breast and sides with black ; edge 

 of wing and short stripe on sides of forehead bright yellow ; 

 length 5.75-6.25 (5.95), wing 2.25-2.40, tail 2.10-2.50, culmen 

 .50-.60, tarsus .80-.92. Sab. Southeastern Florida (marshes of 



Indian Eiver) 551. A. nigrescens Eidgw. 



Dusky Seaside Sparrow. 



