120 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 
Aegialeus semipalmatus Gunpuacs, Repert. Fisico-Nat. Cuba, i, 1866, 359; Journ. 
fir Orn., 1874; 314 (Porto Rico); 1875, 335 (Cuba); 1878, 162, 189 (Porto Rico); 
Anal. Soc. Esp. Hist. Nat., vii, 1878, 384 (Porto Rico).—ScHaLow, Zool. 
Jahrb., Supp., iv, Heft 3, 1898, 665 (Punta Teatina and Cabulco, Chile).— 
Inerine, Revista Mus. Paulista, iii, 1899, 430 (coast Sao Paulo, s. Brazil).— 
Dappene, Orn. Argent., 1910, 217 (Moreno; Puna de Jujuy). 
Hiaticula semipalmata Goutp, in Darwin, Zool. Voy. ‘Beagle,’ Birds, 1841, 128 
(Galapagos Islands).—Gray, List Birds Brit. Mus., iii, 1844, 70 (Rio de 
Janeiro).—Hartiavs, Journ. fiir Orn., 1854, 170 (Galapagos). 
H{iaticula] semipalmata Gray, Gen. Birds, iii, 1847, 544. 
Ch{aradrius] brevirostris Maxrmm1an, Beitr. Naturg. Bras., iv, pt. ii, 1833, 769 
(Brazil; type lost.).¢—Tscuupr1, Wiegmann’s Archiv fir Naturg., x, pt. i, 
1844, 310 (Peru); Fauna Peruana, Aves, 1845-46, 49, 296.—CaBanis, in 
Schomburgk’s Reis. Brit. Guiana, iii, 1848, 750. 
Charadrius brevirostris BurmEIsTER, Syst. Ueb. Th. Bras., iii, i, 1856, 359. 
CHARADRIUS HIATICULA Linneus. 
RING PLOVER. 
Similar to C. semipalmatus, but without any distinct web between 
basal portion of inner and middle toes black or grayish brown; 
pectoral band broader, and size averaging larger. 
Adults in summer (sexes alike).—Anterior portion of forehead, 
lores, suborbital, and auricular regions and fore part of crown black, 
all these areas confluent; forehead, postocular or supra-auricular area, 
malar region, chin, throat, upper neck (all round), lateral upper 
tail-coverts, and under parts, including axillars and under wing- 
coverts, immaculate white, this interrupted below by a broad collar 
of black round lower neck, broader in front, involving sides of chest 
and sometimes invading lower throat; general color of upper parts 
(except as described) deep grayish brown (between hair brown and 
drab), the greater wing-coverts tipped with white; primaries dusky, 
with shafts partially white, the proximal quills with more or less 
white on outer webs; proximal secondaries white, or mostly so; tail 
grayish brown, blackish subterminally and tipped with white, the 
outermost rectrix wholly white; bill black for distal half (approxi- 
mately) the basal half orange or orange-red (in life); iris dark brown; 
legs and feet orange (in life). 
Young.—Black of head-markings and jugular band replaced by 
grayish brown and feathers of upper parts margined with pale buffy; 
otherwise like adults. 
Downy young.—Forehead, superciliary region, malar region, chin 
and throat dull white or grayish white; nuchal collar and under parts 
of body immaculate,white; crown and occiput mottled with pale- 
grayish buffy and black, the occiput narrowly bordered posteriorly 
and laterally with black; back, wings, rump, etc., irregularly barred 
or transversely mottled with pale grayish buffy and black. 
@ See Allen, Bull. Am. Mus. N. H., ii, 1889, 271. One of the types, however, is 
said to be in the collection of the Leyden Museum; see Schlegel, Mus. Pays-Bas, iv, 
no. 29, 1865, 30. 
