&GIALITIS. 



175 



b\ Culmen equal to middle toe, with claw. (Subgenus Ochthodromus Keichen- 



BACH.) 



Adult male: Forehead, superciliary stripe, and lower parts white- 



upper parts brownish gray ; fore-part of crown, streak across lores 



(sometimes wanting), and band across chest, black. Adult female : 



Similar to the male, but black replaced by brownish gray, usually 



more or less tinged with ochraceous or light rusty. Young .- Similar 



to adult female, but feathers of upper parts margined terminally 



with paler. Downy young .- Crown and occiput light grayish buff, 



irregularly marbled with black ; back and rump similar but more 



grayish, the mottling coarser and less distinct ; arm- wing light buff, 



mottled with dusky; hand- wing entirely pure white; forehead, 



superciliary region, sides of head, collar round hind-neck, and lower 



parts white ; a post-ocular black streak. Length about 7.50-7.90, 



wing 4.50, culmen .80, tarsus 1.25, middle toe .75. 



c 1 . Nape and sides of occiput only slightly tinged with ochraceous. 



Female with lores chiefly or entirely white, and band across chest 



usually grayish, tinged more or less with ochraceous. Eggs 1.38 



X 1.02, dull light buffy, very irregularly speckled and zigzagged 



with black or dark brown and purplish gray. Sab. Atlantic and 



Gulf coasts, north to Long Island (casually to Nova Scotia) ; 



both coasts of Mexico, north to Cape St. Lucas in winter. 



280. A. wilsonia (Ord). Wilson's Plover. 



c 2 . Nape and sides of occiput very deeply suffused with ochraceous 



or rusty. Female with lores chiefly or wholly brownish gray, and 



band across chest usually ochraceous or light rusty. Sab. West 



Indies and northern Atlantic coast of South America, to Bahia. 



A. wilsonia rufinucha KiDGW. Rufous-naped Plover. 1 



6 2 . Culmen much shorter than middle toe, with claw. 



c l . Tarsus twice as long as bill, measured from anterior point of loral 

 feathering ; no band across chest. (Subgenus Podasocys Coues.) 

 Summer adult (sexes alike) : Upper parts light grayish brown, 

 sometimes tinged with buff or ochraceous; lower parts dull 

 white, more or less shaded with pale buffy grayish across 

 chest (more or less suffused with buff or ochraceous in spring) ; 

 forehead and superciliary stripe purer white ; fore-part of 

 crown, and streak across lores, black. Winter plumage : Similar 

 to summer dress, but black markings of head wanting, and 

 plumage more strongly tinged with buff. Young : Similar to 

 winter plumage, but whole side of head and neck, and chest, 

 deep creamy buff, and all the feathers of upper parts distinctly 

 bordered with light buff. Downy young : Above brownish buff, 



l JEgialitis wilsonius var. rufinuchus Ridhw., Am. Nat. viii. Feb. 1874, 109. 1 Charadrius crassirostria 

 Spix, Av. Bras. ii. 1825, 77, pi. 94. (Cf. Pelz., Orn. Bras. 1870, 297.) 



