152 SNIPES, SANDPIPERS, ETC. 



II. Bill under 2-00. 



A. Tail with cross-bars. 



a. Wing over 5 - 75. 



a 1 . Outer tail-feathers white, more or less barred ; outer primary with- 

 out bars 255. YELLOW-LEGS. 



a 2 . Outer primary with numerous black bars. 



261. BARTRAMIAN SANDPIPER. 

 a 8 . Outer primary without bars; outer tail-feathers brownish gray. 



260. BUFF. 



b. Wing under 5'75. 



b 1 . Under parts white, with numerous round blackish spots ; upper parts 

 brownish gray, barred with blackish . . 263. SPOTTED SANDPIPER. 



b*. Under parts white, breast streaked with blackish ; upper parts fus- 

 cous, spotted with white 256. SOLITARY SANDPIPER. 



b 9 . Under parts tinged with buffy, inner web of outer primary speckled 



with blackish 262. BUFF-BREASTED SANDPIPER. 



J3. Tail without cross-bars, toes 4. 



a. Bill over 1-10. 



a 1 . Middle upper tail-coverts with cross-bars or streaks. 



a 2 . Tarsus over T50 233. STILT SANDPIPER. 



a 3 . Tarsus under 1-50, wing under 6-00. . 244. CURLEW SANDPIPER. 



a*. Tarsus under 1-50, wing over 6-00 234. KNOT. 



b 1 . Middle upper tail-coverts black or fuscous, without bars; bill 



straight. 

 b 9 . Tarsus under 1-50 ; upper parts blackish, more or less margined 



with gray 235. PURPLE SANDPIPER. 



b 3 . Tarsus under 1-50 ; upper parts more or less margined with rufous. 



239. PECTORAL SANDPIPER. 



b*. Tarsus over 1-50 260. RUFF. 



c 1 . Middle upper tail-coverts grayish, bill curved slightly downward. 



243a. RED-BACKED SANDPIPER. 



b. Bill under 1-10. 



b 1 . Wing under 4-00. 

 6 a . Toes partly webbed. 



246. SEMIPALMATED SANDPIPER. 247. WESTERN SANDPIPER. 



b 9 . Toes not webbed 242. LEAST SANDPIPER. 



c 1 . Wing over 4-00, inner webs of primaries plain. 

 c 2 . Breast white or whitish, streaked or spotted with blackish ; mid- 

 dle upper tall-coverts white . . 240. WHITE-BUMPED SANDPIPER. 

 c 8 . Breast buffy, heavily spotted or streaked with blackish ; middle 

 upper tail-coverts black, slightly margined with rufous. 



239. PECTORAL SANDPIPER. 



c*. Breast buffy lightly spotted or streaked with black ; middle upper 

 tail-coverts fuscous, lightly margined with buffy. 



241. BAIRD'S SANDPIPER. 

 rf*. Wing over 4-00, inner webs of primaries speckled. 



262. BUFF-BREASTED SANDPIPER. 



C. Tail without cross-bars, toes 3 243. SANDERLING. 



