(he) 
or 
Lan) 
AEGIALITIS. 
1. Aigialitis collaris. 
Mbatuitui collar negro, Azara, Apunt. iii. p. 2911. 
Charadrius collaris, Vieill. N. Dict. d’Hist. Nat. xxvii. p. 186°; Seebohm, Geogr. Distr. 
Charadr. p. 173°. 
4igialitis collaris, Lawr. Bull. U.S. Nat. Mus. no. 4, p. 464; Sumichr. La Nat. v. p. 232°; 
Richmond, Pr. U. 8S. Nat. Mus. xvi. p. 526°; Sharpe, Cat. Birds Brit. Mus. xxiv. p. 288°; 
Oates, Cat. Eggs Brit. Mus. ii. p. 27°. 
igialitis azare, Lawr. Ann. Lyc. N. York, vii. p. 334°. 
Aigialitis nivosus (nec Cass.), Salv. Ibis, 1865, p. 191*°; 1866, p. 196". 
Ptil. hiem. Brunnea, vix cinnamomeo lavata; fronte et supercilio indistincto albis ; fascia postfrontali lata 
et striga lorali nigris ; regione paroticali brunnea ; genis et corpore subtus toto albis, torque prepectorali 
nigro; alis brunneis, plumis cinnamomeo marginatis, tectricibus alarum majoribus albo terminatis ; 
tectricibus primariorum remigibusque saturate brunneis, albo terminaliter fimbriatis, rhachidibus 
primariorum albis, secundariis intimis dorso concoloribus ; rectricibus brunneis, albo minute terminatis, 
duabus extimis pure albis, tertia proxima pallide brunnea, extus et ad apicem alba: rostro nigro ; 
pedibus carneis; iride brunnea. Long. tota circa 5°9, ale 3°9, caude 1°85, culm. 0°75, tarsi 1:0. 
(Deser. avis adultee ex Chiapam. Mus. nostr.) 
Ptil. estiv. ptilosi precedenti similis, sed plumis notei magis cinnamomeo indutis, pileo medio et preepectoris 
lateribus clare cinnamomeo indutis. Long. tota circa 5:2, ale 3°7. (Descr. femine adulte ex Playa 
Vicente. Mus. nostr.) 
Hab. Mexico, Playa Vicente, La Antigua, Vera Cruz (Zrujillo’), Tehuantepec city 
(Sumichrast +>); GuatemaLa, Chiapam, Pacific coast ( O. 8.719, Arcé 1"); Nicar- 
agua, Momotombo (Richardson7); Costa Rica, Rio Frio (Aichmond °); Panama 
(M+Leannan °).—Sovta AMERICA generally’; West Lyp1es, Grenada ‘. 
Ai. collaris is a well-known species of Sand-Plover in the Neotropical Region and is 
easily recognized by the distinct black collar on the fore-neck. ‘The upper surface 
is uniform in colour and has no black or white collars on the hind-neck, such as are 
often seen in the members of this genus. 
Though generally found on the coast in Central America, it is also met with on the 
rivers of the interior, as is the case in South America. In habits this bird appears to 
resemble its congeners. 
9. Aigialitis nivosa. 
Aigialitis nivosus, Cass. in Baird’s Birds N. Amer. p. 696"; Lawr. Ann. Lyc. N. York, ix. p. 209 *; 
Mem. Bost. Soc. N. H. i. p. 307°. 
Aigialitis nivosa, Zeledon, An. Mus. Nac. Costa Rica, 1887, p. 129*; A. O. U. Check-l. N. Amer. 
Birds, 2nd ed. p. 102°; Elliot, N. Amer. Shore-Birds, p. 188°; Sharpe, Cat. Birds Brit. 
Mus. xxiv. p. 2907; Oates, Cat. Eggs Brit. Mus. ii. p. 27, t. 2. fig. 5°. 
Aigialitis alexandrina nivosa, Baird, Brew., & Ridgw. Water-Birds N. Amer. i. p. 164°. 
Charadrius cantianus nivosus, Seebohm, Geogr. Distr. Charadr. p. 171”. 
Pul. hien. Zé. collari similis, sed major, loris pure albis, haud linea nigra transversa ornatis; torque 
prepectorali nullo, torque cervicali albo obsoleto, plaga nigra ad latera colli insignis: rostro nigro, 
mandibule basi sordide aurantiaca; pedibus purpurascenti-nigris ; iride nigra. Long. tota circa 5:3, 
alee 4°3, caude 1°85, culm, 0°8, tarsi 0°9. (Deser. avis adults ex Mexico meridionali. Mus. nostr. 
