"Young.--Differs from the adults in wanting the black on the head, as well as the black collars on the mantle and fore neck; general tone of the plumage more rufescent than in the adults, and the whole of the upper surface varied with wavy lines of pale sandy buff, before which is a subterminal dusky bar; forehead pale sandy buff; ear-coverts dusky blackish; the collar on the fore neck composed of brown feathers, with generally a tinge of sandy buff on the throat. The black markings on the head and the black collars are gained by a molt in the following spring. There appears to me to be also a change of feathers especially on the neck collar." (Sharpe.) This little plover was abundant along the Baco River in the vicinity of Balete, Mindoro, where it nested on the extensive gravel-flats exposed by low water. A nest found April 24, 1905, was a slight hollow, lined with a mosaic of small pebbles. The three eggs measure 30.4 by 21.8; 28.9 by 21.8; 30.9 by 21.8. Their ground-color is very pale gray, almost white, carrying a considerable number of small lilac-colored spots. Small spots and irregularly shaped markings of dark brown are scattered over the entire surface, but are more numerous on the larger end. "A resident species, usually met with about small fresh-water streams in the interior." (Bourns and Worcester MS.) 96. ÆGIALITIS PERONI (Bonaparte). MALAY SAND PLOVER. Charadrius peroni Bonaparte, Compt. Rend. (1856), 43, 417. Ægialitis peroni Sharpe, Cat. Birds Brit. Mus. (1896), 24, 273; Hand-List (1899), 1, 154; Grant and Whitehead, Ibis (1898), 247, pl. 6, fig. 8 (egg); Oates, Cat. Birds' Eggs (1902), 2, 25; McGregor and Worcester, Hand-List (1906), 23. Bantayan (McGregor); Basilan (McGregor); Bohol (Everett); Calayan (McGregor); Cebu (McGregor); Fuga (McGregor); Leyte (Everett); Lubang (McGregor); Luzon (Whitehead, McGregor); Mindanao (Steere Exp., Everett); Mindoro (Porter); Negros (Steere Exp.); Palawan (Lempriere, Whitehead, Platen); Romblon (McGregor); Sibutu (Everett); Sibuyan (McGregor); Siquijor (Steere Exp., Bourns & Worcester); Ticao (McGregor). Greater Sunda Islands to Celebes.