152 SNIPES, SANDPIPERS, ETC. 



II. Bill under 200. 



A. Tail with cross-bars. 



a. Wing over 5-75. 



ai. Outer tail-feathers wliite, more or less barred; outer primary with- 

 out bars 255. Yellow-legs. 



a2. Outer primary with numerous black bars. 



2G1. Bartramian Sandpiper. 



b. Wing under 5-75. 



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

 brownish gray, barred with blackish . . 263. Spotted Sandpiper. 



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

 cous, spotted with white 25G. Solitary Sandpiper. 



^3. Under parts tinged with bufty, inner web of outer primary speckled 

 with blackish 262. Buff-breasted Sandpiper. 



b^. Under parts white, breast washed with grayish, inner primaries and 

 secondaries with a concealed white patch. 



263. Spotted Sandpiper (Im,). 



B. Tail without cross- bars, toes 4. 



a. Bill over 1-10. 



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



a'. Tarsus over 1-50 233. Stilt Sandpiper. 



a3. Tarsus under 1*50, wing under 6"00 . . 244. Curlew Sandpiper. 



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



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

 straight. 

 &2. Tarsus under 1'50 ; upper parts blackish, more or less margined 



with gray 235. Purple Sandpiper. 



J3. Tarsus under 1-50 ; upper parts more or less n)argined with rufous. 



239. Pectoral Sandpiper. 



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



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



243a. Eed-backed Sandpiper. 



b. Bill under I'lO. 



^1. Wing under 4-00. 

 ^2. Toes partly webbed. 



246. Semipalmated Sandpiper. 247. Western Sandpiper. 



b^. Toes not webbed 242. Least Sandpiper. 



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

 c2. Breast white or whitish, streaked or spotted with blackish ; mid- 

 dle upper tail-coverts white . . 240. White-rumped Sandpiper. 

 cs. 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. 

 d^. Wing over 4-00, inner webs of primaries speckled. 



2G2. Buff-breasted Sandpiper. 



C. Tail without cross-bars, toes 3 248. Sanderling. 



