108 BULLETIISr 50, UNITED STATES NATIONAL MUSEUM. 



without claw, about one-fourth as long as wing, slender, the acrotar- 

 sium with rather indistinct transverse scutella (some of which, how- 

 ever, are broken into smaller hexagonal scales), the planta tarsi with 

 smaller and much less distinct transverse scutella; outer toe decidedly 

 shorter than middle toe but decidedly longer than inner toe; hallux 

 absent; a small web between basal phalanges of outer and middle toes, 

 but none between inner and middle toes; claws small, nearly straight. 



Coloration. — Under parts immaculate white, interrupted by a jugu- 

 lar band of black (adult male) or grayish brown or cinnamon (adult 

 female and young) ; forehead and superciliary stripe white; loral stripe 

 and forepart of crown, black (adult male) or grayish brown (female and 

 young) ; rest of upper parts grayish brown, the primaries, etc., darker. 



Range. — Atlantic and Gulf coasts of United States and northern 

 South America; West Indies; Pacific coast of Mexico. (Monotypic.) 



KEY TO THE SUBSPECIES OF PAGOLLA WILSONIA. 



a. Black or hrown loral stripe narrower, continued very narrowly beneath eye, not 



involving anterior portion of forehead or of malar region; white frontal band 



broader, and wliite sup-a-auricular area distinct; color of upper parts lighter; 



middle toe 18-20 mm. 



h. Adult female with pileiim, subauricular region and jugular band grayish brown. 



(Atlantic and Gulf coasts of United States; West Indies.) 



Pagolla wilsonia wilsonia ((p. 108). 

 66. Adult female with pileum, subauricular region and jugular band cinnamon or 

 sayal brown. (Carribbean coast of Colombia and Venezuela.) 



Pagolla wilsonia cinnamomina (p. 113). 

 aa. Black or brown loral stripe much broader, continued broadly l)eneath eye, and 

 involving anterior portion of forehead and malar region; white frontal l)and nar- 

 rower, and white supra-auricular area indistinct or obsolete; color of upper 

 parts darker; middle toe 17.5-18 mm. (Pacific coast of Mexico.) 



Pagolla wilsonia beldingi (p. 112). 



PAGOLLA WILSONIA WILSONIA (Ord). 



WILSON'S PLOVER. 



Adult male in summer. — Forehead (backward laterally to above 

 eyes), sides of rump, lateral upper tail-coverts, and under parts, 

 including axillars and under wing-coverts white, on the under parts 

 interrupted by a band of black across chest; loral stripe (from bill to 

 eye) and anterior portion of crown black; rest of upper parts grayish 

 brown, the greater wing-coverts narrowly tipped with white, the 

 auricular and supra-auricular regions and nape sometimes more or less 

 tinged with cinnamon-rufous or rusty; primaries dusky, the outer- 

 most with shaft white, the shafts of the others partly white, the prox- 

 imal ones with a little white on basal portioii of outer webs; tail 

 rather light grayish brown becoming darker subtermin.ally and 

 whitish at tip, the general color becoming gradually paler from the 

 middle rectrices to the outer pair, which are wholly white; bill 

 black; iris dark brown; eyelid grayish; legs and feet pale grayish flesh 

 color (in life). 



