APHRIZIDJE. 179 



Tropical America in general (except West Indies) 

 north to southern Mexico. 



^. collaris (Vieill.). Azara's Ring Plover.' 

 e". Bill stout, the culmen decidedly shorter than middle toe 

 (^vithout claw). 



Summer adult: Above grayish brown, beneath white; 

 hind-neck and broad band across chest clear cinnamon- 

 rufous; lores, orbital region, and ear-coverts black, the 

 former bordered above by a white line, sometimes 

 meeting on forehead. (Female usually with rufous 

 paler and less abruptly defined than in the male, and 

 black markings of head less distinct.) Winter plumage : 

 Somewhat similar to summer dress, but rufous entirely 

 absent, the chest ci-ossed by an indistinct grayish 

 brown narrow band, becoming broader and deeper in 

 color laterally ; black of earcoverts, loral streak, etc., 

 replaced b}- dull grayish brown; forehead white. 

 Young : Much like winter dress, but plumage more 

 or less suffused with buff, and feathers of upper parts 

 distinctly bordered with buff or dull ochraceous. 

 Length 6.25-7.00, wing about 5.15-5.40, culmen .62, 

 tarsus 1.15, middle toe .73. Eggs 1.43 X 1-05, pale dull 

 olive, varying to huffy olive, rather sparsely and 

 irregularly speckled with dark brown and black. 

 ffab. Northern Asia, south in winter to Malay Archi- 

 pelago, Philippines. Australia, etc. ; accidental on 

 Choris Peninsula, Alaska. 



279. JE. mongola (Pall.). Mongolian Plover. 



Family APHRIZID.^. — The Surf Birds and Turnstones. 



(Page 143.) 



Genera. 



Xasal groove more than half the length of the maxilla ; tail emarginate ; ter- 

 minal portion of bill somewhat swollen, with the upper outline decidedly 

 convex (as in tlie Plovers, Charadriidce) Aphriza. (Page 180.) 



Nasal groove not more than half the length of the maxilla ; tail slightly rounded ; 

 terminal half of bill compressed and pointed, with the upper outline straight, 

 or sometimes even slightly concave Arenaria. (Page 180.) 



' CKaradriM collarit Vieill., Edc. M(th. ii. 1S2.'!, 334. ^gialitio collarit ScL. i. Salt. P. Z. S. 1S69, 



