APHRIZIDZ. 179 
Tropical America in general (except West Indies) 
north to southern Mexico. 
48. collaris (VIEILL.). Azara’s Ring Plover.! 
e. Bill stout, the culmen decidedly shorter than middle toe 
Cvithout 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 crossed by an indistinct grayish 
brown narrow band, becoming broader and deeper in 
color laterally ; black of ear-coverts, loral streak, ete., 
replaced by 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 buffy olive, rather sparsely and 
irregularly speckled with dark brown and _ black. 
Hab. Northern Asia, south in winter to Malay Archi- 
pelago, Philippines, Australia, etc.; accidental on 
Choris Peninsula, Alaska. 
279. 4E. mongola (PaLL.). Mongolian Plover. 
Famiry APHRIZIDA‘.—Tue Surr Brrps anp TuRNSTONES. 
(Page 143.) 
Genera. 
a’. Nasal 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 the Plovers, Charadriid@).......0..s000008 Aphriza. (Page 180.) 
a. 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.........:esssseseeeeee Arenaria. (Page 180.) 
1 Charadrius collarie Vie1Lu., Enc, Méth. ii. 1823, 334, digialitis collaris Sct. & Sauv. P. Z. S. 1869, 
252, 
