390 CHARADRIIDA. 
was the most abundant?. In Costa Rica Mr. Cherrie found that it arrived with 
Bartram’s Sandpiper, and disappeared at the same time as the latter, being observed 
from September 5 to November 145, 
The present species is very similar in habits to the European Dunlin (Pelidna 
alpina), frequenting in the autumn mud-flats and saltings, often in flocks, distributing 
itself over the ground in search of worms and small molluscs, which appear to be 
the usual food of the smaller Waders. During the breeding-season, as recorded by 
Mr. Nelson, it has a curious habit of inflating the throat into a kind of sac, rising to 
some height in the air, and uttering hollow booming notes’. 
The nest is usually placed in a tuft of grass’. The eggs are four in number, 
pyriform and somewhat glossy, of a pale greyish-green colour, coarsely marked all over 
with spots and streaky blotches of umber-brown and underlying pale purple; the 
markings are confluent and form a cap at the larger end. 
2. Heteropygia bairdi. . 
Actodromas bairdi, Coues, Proc. Acad. Philad. 1861, p. 194°; Scl. P. Z. S. 1862, p. 369°; Baird, 
Brew., & Ridgw. Water-Birds N. Amer. i. p. 230°. 
Tringa bairdit, Seebohm, Geogr. Distr. Charadr. p. 444*; Allen, Bull. Amer. Mus. N. H. v. 
p.- 838°; A. O. U. Check-l. N. Amer. Birds, 2nd ed. p. 88°; Elliot, N. Amer. Shore-Birds, 
p. 83’. 
Heterupygia bairdi, Sharpe, Cat. Birds Brit. Mus. xxiv. p. 570°; Oates, Cat. Eggs Brit. Mus. ii. 
p- 55, t. 2. fig. 4°. . 
Tringa deppii, Licht. Preis-Verz. Mex. Vog. p. 3°; Cab. J. f. Orn. 1863, p. 59”. 
Ptil. hiem. H. maculate similis, sed minor, pedibus nigris, hypochondriis concoloribus, minime striatis, et 
plaga preepectorali minus extensa distinguenda: rostro nigro; pedibus schistaceo-nigris; iride saturate 
brunnea. Long. tota circa 6°5, ale 4°65, caude 1°85, culm. 0°9, tarsi 0°8. (Descr. avis adults ex Mexico. 
Mus. nostr.) 
Pil. estiv. Supra nigricans, plumis rufo marginatis ; plaga preepectorali magis rufescente et magis distincte 
nigro medialiter lineatis. Long. tota circa 7-0, alee 5:0, caudee 1°85, culm. 0°95, tarsi 0-9. (Descr. maris 
adulti ex Zacatecas. Mus. nostr.) 
Hab. Norta America, chiefly in the interior, rare along the Atlantic coast, and not 
yet recorded from the Pacific side of the United States®—Muxico (Deppe & 
Schiede © 4, Parzudaki*), Sonora (Robinetie®), Aguas Calientes, Zacatecas 
(Richardson ®), Tres Marias Is. (Forrer ®), city of Mexico, Puebla, Las Vegas, 
Jalapa (Ferrari-Perez *).—Soutn America generally in winter to Chile 8.—Inci- 
dental in S.W. Africa 8. 
H. bairdi is smaller than H. maculata, the wing being less than five inches in 
length, and the dusky band on the fore-neck is less extensive; but the absence 
of streaks or mottlings on the sides of the body and the black legs will, however, 
distinguish it at all ages. | 
Its breeding-range extends far to the north, but in winter the bird appears to have 
a more western habitat than H. maculata. 
