61 



of a colony on the Hudson at Piermont, is, so far as known, con- 

 fined entirely to the salt marshes of our coasts. (See Group, 

 Gallery, between Cases H and I.) 



245. Ammodramus caudacutus nelsoni Allen. NELSON'S 

 SHARP-TAILED SPARROW. (5490.) Breeds in the marshes of the 

 interior from northern Illinois northward to Dakota and Manitoba ; 

 occurs as a migrant on the Atlantic coast, and winters from South 

 Carolina to Texas. This species is known here only as a rather 

 rare fall migrant in the Hudson River Valley, occurring from the 

 latter part of September to the latter part of October. 



246. Ammodramus caudacutus subvirgatus Dwight. 

 ACADIAN SHARP-TAILED SPARROW. (549^.) u Marshes of southern 

 New Brunswick, Prince Edwards Island and probably Nova Scotia, 

 and southward in migration along the Atlantic coast" (Dwight). 

 This bird occurs with the preceding. 



247. Ammodramus maritimus (IVils.}. SEASIDE SPARROW. 

 (550.) Atlantic coast, breeding from North Carolina to Massachu- 

 setts, and wintering from Virginia to Georgia. This is an even 

 more abundant summer resident than the Sharp-tailed Finch and, 

 like it, is confined exclusively to our coasts, with the exception of a 

 colony in the Piermont marshes. (See Group, Gallery, between 

 Cases H and I.) 



FIG. 23. SEASIDE SPARROW. 



248. Chondestesgrammacus^tfy). LARK SPARROW. (552.) 

 -Interior of North America, eastward to Illinois, breeding from 



