120 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



Aegialeus semipalmatics Gundlach, Repert. Fisico-Nat. Cuba, i, 1866, 359; Journ. 

 fiir 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. 

 Jalirb., Supp., iv. Heft 3, 1898, 665 (Punta Teatina and Cabulco, Chile).— 

 Ihering, Revista Mus. Paulista, iii, 1899, 430 (coast Sao Paulo, s. Brazil). — 

 Dabbene, Orn. Argent., 1910, 217 (Moreno; Puna de Jujuy). 



Hiaticula semipalmata Gould, in Darwin, Zool. Voy. 'Beagle,' Birds, 1841, 128 

 (Galapagos Islands). — Gray, List Birds Brit. Mus., iii, 1844, 70 (Rio de 

 Janeiro). — Hartlaub, Journ. fiir Orn., 1854, 170 (Galapagos). 



n[iaticula] semipalmata Gray, Gen. Bii'ds, iii, 1847, 544. 



Ch[aradrius] hrevirostris Maximilian, Beitr. Naturg. Bras., iv, pt. ii, 1833, 769 

 (Brazil; type lost.).« — Tschudi, Wiegmann's Ai-chiv fiir Naturg., x, pt. i, 

 1844, 310 (Peru); Fauna Peruana, Aves, 1845-46, 49, 296.— Cabanis, in 

 Schombm-gk's Reis. Brit. Guiana, iii, 1848, 750. 



Charadrius hrevirostris Burmeister, Syst. Ueb. Th. Bras., iii, i, 1856, 359. 



CHARADRIUS HIATICULA Linnaeus. 



RING PLOVER. 



Similar to G. 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 axiilars 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 haK (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 bj 

 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, 



o 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. Paya-Bas, iv, 

 no. 29, 1865, 30. 



