io6 Field Museum of Natural History — Zoology, Vol. IX. 



Pisobia maculata. 



Rump, blackish; middle upper tail 

 coverts, black (not banded); inner web 

 of primaries, not speckled. 



Pisobia maculata. 

 Pectoral Sandpiper. Grass Bird. 

 See No. 114. 



Inner webs of primaries, 

 speckled. 



Tryngites subruficollis . 

 Buff-breasted Sandpiper. 

 See No. 129. 



Tryngties subruficollis. 



* GROUP 5. Wing, 6.75 to 9 inches long. 



SECTION 1. Toes, four, with more or less web; bill, curved up- 

 wards or straight; bill, over 2.60. 



Willet. 



Catoptrophorus semipalmatus. 



Axillars, smoky black; belly, white; terminal third of outer pri- 

 mary, black; the rest, white; bill, nearly straight. 



Catoptrophorus semipalmatus. 



Willet. 



Catoptrophorus semipalmatus inornatus. 



Western Willet. 



See Nos. 127 and 127a. 



* For directions for measurement, see page 21. 



