214 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



ments, wing 54.61, tail 46.74, exposed culmen 10.41, tarsus 20.32, middle 

 toe 15.49. (^lississippi Valley, breeding northward; Atlantic coast, 

 especially southward, during migrations. ) 



•Ammod ramus caudacutus nelsoni (]>. 221) 

 cc. Back and scapular^: without conspicuous lighter streaks; superciliary stripe 

 pale buff, often tinged with grayish posteriorly and with pale yellow 

 anteriorly, less strongly contrasted with the paler brown or olivaceous 

 lateral stripes of the pileum; chest, sides, and flanks pale hvdl, usually 

 obsoletely, rarely distinctly, and never (?) sharply, streaked with grayish; 

 average measurements, wing 56.90, tail 49.53, exposed culmen 10.67, 

 tarsus 21.34, middle toe 16.26. (Atlantic coast of United States and New 

 Brunswick, breeding from Massachusetts northward. ) 



Ammodramus caudacutus subvirgatus (p. 223) 

 aa. Pileum with a distinct light-colored median stripe; feathers of back and scapu- 

 lars with chestnut-colored markings; feet pale yellowish. 

 h. Bill small (exposed culmen averaging 9.14, depth at base not more than 5.59); 

 hindneck chestnut streaked with light grayish; edge of wing white. (Great 

 Plains, etc., southeastward in winter.) 



Ammodramus leconteii (p. 224) 



hh. Bill large and stout (exposed culmen averaging 1U.67 or ixiore, depth at base 



not less than 6.35); hindneck buffy olive streaked with black; edge of wing 



pale yellowish. 



r. Darker, with more chestnut on upper parts, and under parts more buffy. 



(Eastern United States, west to edge of Great Plains, north to Ontario.) 



Ammodramus henslowii henslowii (p. 226) 



cc. Paler, with less chestnut on ui^per jiarts, and under parts whiter. (South 



Dakota in summer. ) Ammodramus henslowii occidentalis (p. 228) 



AMMODRAMUS MARITIMUS MARITIMUS (Wilson). 

 SEASIDE SPARROW, 



Ninth primary not longer than fourth. 



Adult.'s {sc.vts alike). — Above olive-grayish, tinged with olive, especially 

 on back, where feathers are somewhat darker with light grayish edges, 

 producing more or less distinct streaks; pileum olive laterally, gray- 

 ish medially, producing three broad but very indistinct and faintly 

 contrasted stripes; a supraloral streak of j^ellow, usually passing into 

 whitish posteriorly, succeeded by a broad supra-auricular stripe of olive- 

 grayish; a malar stripe, chin, throat, and abdomen white; submalar 

 stripe and broad streaks on chest grayish; edge of wing yellow. 



Young. — Above browner than in adult, the back broadly and pileum 

 narrowly streaked with blackish; beneath whitish, the chest, sides, and 

 flanks more or less strongly buli'y and streaked with dusky. 



Adult male.— Length (skins)," 132. 08-147. 32 (140.72); wing, 60.71- J 

 65.28 (62.99); tail, 50.80-58.93 (55.37); exposed culmen, 12.70-14.73 * 

 (13.72); depth of bill at base, 6.35-7.37 (7.11); tarsus, 22.61-24.13 

 (23.37); middle toe, 17.27-18.54 (17.78).^ 



Adult female.— l^engih (skins), 129.54-142.24 (138.68); wing, 55.88- 



^ Sixteen specimens. 



