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



* GROUP 1. Wing, 3.75 to 4.50 inches long. 

 SECTION 1. Bill, uiuler .60. 



Bill, orange at base, the tip, black; legs, dull flesh 

 color; a black stripe from bill passing under each eye. 



Mgialitis semipalmata. 

 Semipalmated Plover. 



See No. 137. 



.i^lgialitis 

 semipalmata. 



Bill, orange at base, the tip, black; legs, orange yellow; two middle 

 tail feathers, tipped with white , no black stripe from bill to eye ; more 

 or less of a black breast band. Mgialitis meloda. 



Piping Plover. 



See No. 138. 



* GROUP 2. Wing, 4.50 to 5.50 inches long; toes, three, no 



hind toe. 



SECTION 1. Bill, under .60 inch long. 



Bill, orange at base, the tip, black; legs, dull flesh color; a black 

 stripe from bill passing under eye. .'Egialitis semipalmata. 



Semipalmated Plover. Ring Neck. 

 See No. 137. 



Bill, orange at base, the tip, black; legs, orange yellow; no black 

 stripe from bill to eye ; black breast band, not confluent; two middle 

 tail feathers, tipped with white. Eastern species not found west of 

 Rocky Mountains. ALgialitis meloda. 



Piping Plover. 

 See No. 138. 



* GROUP 3. Wing, 5.50 to 6.75 inches long; toes, three, 



no hind toe. 



Breast, with two black bands; under parts, white; rump and 

 tail coverts, orange brown. Oxyechus vociferus. 



Killdeer Plover. 



See No. 136. 



* For directions for measurement, see page 21. 



