358 CHARADRIIDA, 
Ptil. hiem, Supra brunneus, tectricibus alarum majoribus albo terminatis, fasciam albam formantibus ; remigi- 
bus sepiariis, rhachidibus albis, secundariis brunneis, longioribus extus albis, intimis longissimis dorso 
concoloribus ; rectricibus brunneis, albo terminatis, fascia lata nigra subterminali ornatis, rectricibus 
duabus extimis pure albis ; loris et linea frontali basali et fascia altera postfrontali nigris, facie laterali 
nigra, postice brunnea; genis cum gutture toto, torque collari et corpore subtus pure albis; torque 
nigro cervicem totam circumdante: rostro nigro, basaliter aurantiaco ; pedibus pallide carneis, unguibus 
nigris ; iride saturate coryllina. Long. tota circa 6:5, ale 4°5, caude 1-15, culm. 0°6, tarsi 0-95. 
2 mari similis, sed fascia nigra verticali obsoleta, et torque cervicali brunneo nec nigro distinguendus. Long. 
tota circa 6-5, ale 4°6. (Descr. maris et femine ptil. hiem. ex Chiapam. Mus. nostr.) 
Hab. Norta America, Arctic and sub-Arctic Regions, migrating south in autumn 13, __ 
Mexico, Mazatlan (Grayson ®), Tres Marias Is. (Grayson®* 1°, Forrer 1°), San 
Mateo, Tehuantepec 9, Santa Maria del Mar ? (Swmichrast), Cozumel I. 
(Gaumer? 16); Guaremata, Chiapam (0. 8.4516); Costa Rica (v. Frantzius?, 
Zeledon 11), Bahia de Salinas (Underwood, in litt.).—SouTH AMERICA GENERALLY AND 
West INDIES, in winter !°, 
Compared with Ochthodromus wilsoni and Oayechus vociferus, this species is a 
stoutly-built little bird with a small thick bull. In general appearance it resembles 
the Common Ring-Plover of Europe (Agialitis hiaticula). 
ZB. semipalmatus breeds in the Arctic Regions of North America and Greenland, 
being known in the United States chiefly as a migrant. Like many other wading 
birds, it passes along the coasts of Central America in spring and autumn, some 
individuals doubtless wintering in these localities, also visiting the West Indies and 
the Galapagos Islands, and occurring on the coasts of South America as far down 
as Brazil and Chile. It does not seem to be very plentiful in Central America, and 
Salvin only once met with the bird on the sandy flats of Chiapam, on the Pacific coast 
of Guatemala, in January *. 
The habits of this Plover resemble those of the species of #ygialitis. It frequents 
the sandy beaches on the sea-shore in company with other small Waders, also visiting 
the saltings and mud-flats when the tide recedes. On migration it passes through the 
interior of North America, and is then found on the edges of ponds and inland rivers, 
its food consisting of minute mollusca and insects *. 
The bird makes no nest, but lays its four eggs in a depression, which is sometimes 
lined with a few dead leaves. ‘The eggs are of a drab-colour, with black spots and 
blotches 14. 
JEGIALITIS. 
Aigialitis, Boie, Isis, 1822, p. 553; Sharpe, Cat. Birds Brit. Mus. xxiv. p. 254 (1896). 
This genus, which comprises the true Sand-Plovers, is very like the preceding in 
form and appearance, but has all the toes free down to the base, without any 
connecting web as in Agialeus. ‘The hind toe is wanting, and the tail is short and 
square, not equalling half the wing in length. Eighteen species are recognized, two 
of which have been recorded from Central America. 
