+Totanus bartramia+, _Burm. La-Plata Reise_, ii. p. 503 (Mendoza). +Actiturus bartramius+, _Scl. et Salv. Nomencl._ p. 146; _Durnford, Ibis_, 1877, p. 199 (Buenos Ayres); _Barrows, Auk_, 1884, p. 315 (Entrerios); _Withington, Ibis_, 1888, p. 472 (Lomas de Zamora). +Bartramia longicauda+, _Baird, Brew., et Ridgw. Water-B. N. A._ i. p. 296. +Totanus bartrami+, _Seebohm, Plovers_, p. 376. _Description._--Above blackish, feathers edged with yellowish brown; rump black; wing-coverts yellowish brown, barred with black; primaries blackish: beneath white; breast and flanks ochraceous, spotted and barred with black; under surface of wings barred with white and black; bill yellowish, tip black; feet yellow: whole length 10·0 inches, wing 6·3, tail 3·1. _Female_ similar. _Hab._ North America, migrating south to Buenos Ayres. Bartram's Sandpiper is another of those species which breed in North America, and extend their winter-migrations far into the Southern Hemisphere. It differs, however, from its fellow-migrants, which visit the Argentine country, in its wide and even distribution over all that portion of the pampas where the native coarse grasses which once covered the country have disappeared, an area comprising not less than 50,000 square miles. It begins to arrive as early as September, coming singly or in small parties of three or four; and, extraordinary as the fact may seem when we consider the long distance the bird travels, and the monotonous nature of the level country it uses as a "feeding area," it is probable that every bird returns to the same spot year after year; for in no other way could such a distribution be maintained, and the birds appear every summer evenly sprinkled over so immense a surface.