^GIALITIS. 359 



1. ^gialitis coUaris. 



Mbatuitui collar negro, Azara, Apunt. iii. p. 291 \ 



Charadrius coUaris, Vieill. N, Diet. d'Hist. Nat. xxvii. p. 136'; Seebohm, Geogr. Distr. 



Charadr. p. 173'. 

 jEgialifis coUaris, Lawr. Bull. U. S. Nat. Mus. no. 4, p. 46*; Sumichr. La Nat. v. p. 232'; 



Richmond, Pr. U. S. Nat. Mus. xvi. p. 526°; Sharpe^ Cat. Birds Brit. Mus. xxiv. p. 288'; 



OateSj Cat. Eggs Brit. Mus. ii. p. 27 ^ 

 jEgialitis azar<e, Lawr. Ann. Lye. N. York, vii. p. 334 '. 

 MgiaUtis nivosus (nee Cass.), Sal v. Ibis, 1865, p. 191 "; 1866, p. 196". 



Piil. Mem. Brunnea, vix cinnamomeo lavata ; fronte et supercilio indistincto albis ; fascia postfrontaU lata 

 et striga lorali nigiis ; region e paroticali brunnea ; genis et corpore subtus toto albis, torque prsepectorali 

 nigro ; alis brunneis, plumis cinnamomeo marginatis, tectricibus alarum majoribus albo terminatis ; 

 tectricibus primariorum remigibusque saturate brunneis, albo terminaliter fimbriatis, rhacbidibus 

 primariorum albis, eeeundariis intimis dorso concoloribus ; rectricibus brunneis, albo minute terminatis, 

 duabus extimis pure albis, tertia proxima pallide brunnea, eitus et ad apicem alba : rostro nigro ; 

 pedibus carneis ; iride brunnea. Long, tota circa 5'9, alae 3-9, caudae 1-85, culm. 0"75, tarsi 1-0. 

 (Descr. avis adultse ex Chiapam. Mus. nostr.) 



Ptil. cestiv. ptilosi prsBcedenti similis, sed plumis notsei magis cinnamomeo indutis, pileo medio et prsepectoris 

 lateribus clare cinnamomeo indutis. Long, tota circa 5-2, alee 3-7. (Descr. feminae adultse ex Playa 

 Vicente. Mus. nostr.) 



Eab. Mexico, Playa Vicente, La Antigua, Vera Cruz [Trujillo '^), Tehuantepec city 

 (Sumichrast^^); Guatemala, Chiapam, Pacific coast (O.S.'^^'^, Arce^^); Nicar- 

 agua, Momotombo {Bichardson '^) ; Costa Eica, Rio Frio {Bichmond ^) ; Panama 

 {M'Leannan ^). — South America generally '' ; West Indies, Grenada '. 



^. coUaris is a well-known species of Sand- Plover in the Neotropical Eegion 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. 



2. .Slgialitis nivosa. 



jEgialitis nivosus, Cass, in Baird's Birds N. Amer. p. 696 ' ; Lawr. Ann. Lye. N. York, ix. p. 209 ' ; 



Mem. Best. Soc. N. H. ii. p. 307 \ 

 ^gialitis nivosa, Zeledon, An. Mus. Nac. Costa Rica, 1887, p. 129* ; A. O. U. Check-1. N. Amer. 

 Birds, 2nd ed. p. 102 ' ; Elliot, N. Amer. Shore-Birds, p. 188 ' ; Sharpe, Cat. Birds Brit. 

 Mus. xxiv. p. 290"; Gates, Cat. Eggs Brit. Mus. ii. p. 27, t. 2. fig. 5°. 

 jEgialitis alexandrina nivosa, Baird, Brew., & Ridgw. Water-Birds N. Amer. i. p. 164 \ 

 Charadrius cantianus nivosus, Seebohm, Geogr. Distr. Charadr. p. 171 ". 



Ptil. Mm. uE. coUari similis, sed major, loris pure albis, baud linea nigra transversa ornatis ; torque 

 pr^pectorali nullo, torque cervicali albo obsoleto, plaga nigra ad latera colli insignis : rostro nigro, 

 mandibute basi sordide aurantiaca ; pedibus purpurascenti-nigris ; iride nigra. Long, tota circa 5-y, 

 alje 4-3, caudse 1'85, culm. 0-8, tarsi 0-9. (Descr. avis adults ex Mexico meridionali. Mus. nostr. 



