AMMODRAMUS. 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 .5S-.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-.5S (.56), depth 

 of bill at base .2S-.26 (.24), tarsus .S5-.87 (.86). Eggs .76 X 

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

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

 Edward Island and Nova Scotia to North Carolina. 



549. A. caudacutus (&MEL.). Sharp-tailed Sparrow. 



d*. 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 ochi'aceous, 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-.5S (.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 .S2-.85 (.83). Hob. Fresh-water marshes of east- 

 ern United States, chiefly in Mississippi Yalleyj east during 

 migrations to marshes of Atlantic coast (Massachusetts to 



South Carolina) 549a. A. caudacutus nelsoni ALLEN. 



Nelson's Sparrow. 



c 2 . 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. 

 Hab. Salt marshes of Atlantic and G-ulf coasts, from Massachu- 

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



d 3 . 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 bi'ight yellow ; 

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

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



Indian Eiver) 551. A. nigrescens EIDGW. 



Dusky Seaside Sparrow. 



