This genus should be united to Ægialitis from which its members differ only in being a little larger. Species. a1. Axillars and under wing-coverts white; wing about 140 mm. b1. Larger; culmen more than 23 mm. ... geoffroyi (p. 106) b2. Smaller; culmen less than 20 mm. ... mongolus (p. 107) a2. Axillars and under wing-coverts smoky brown; wing about 165 mm. ... veredus (p. 108) 92. OCHTHODROMUS GEOFFROYI (Wagler). LARGER SAND PLOVER. Charadrius geoffroyi Wagler, Syst. Av. (1827), 61. Ochthodromus geoffroyi Sharpe, Cat. Birds Brit. Mus. (1896), 24, 217; Hand-List (1899), 1, 153; Oates, Cat. Birds' Eggs (1902), 2, 20; McGregor and Worcester, Hand-List (1906), 23. Ma-tang va-ca de collar, general name for small plovers. Bantayan (McGregor); Batan (McGregor); Bohol (Everett, McGregor); Cagayancillo (McGregor); Cebu (McGregor); Cuyo (McGregor); Leyte (Everett); Lubang (McGregor); Luzon (Whitehead, McGregor); Negros (Everett, Bourns & Worcester); Mindanao (Mearns); Mindoro (McGregor, Porter); Palawan (Everett, Lempriere, Platen, Whitehead, Steere Exp., Bourns & Worcester, White); Panay (Steere Exp.); Pata (Mearns); Siquijor (Bourns & Worcester). Japan, Formosa, and Hainan, south in winter to Africa, India, and Australia. "Adult in breeding plumage.--Above light brown, with a slight olive-greenish gloss, wing-coverts like the back, with obsolete indications of paler fringes to some of the feathers, greater series tipped with white, forming a narrow wing-bar; alula, primary-coverts, and quills brown, primaries darker brown along their outer webs and at tips, shafts white; inner primaries with a white mark toward the base of outer web; secondaries brown, with white fringes to the end of outer web and white tips, shafts white, with a little extension along the sides of the shaft in the inner secondaries; innermost long secondaries like back, outer ones white along their outer web; rump and upper tail-coverts a little lighter and more ashy brown than the back, with white fringes to most of the feathers; sides of rump white; tail ashy brown with a broad white tip, a subterminal shade of darker brown, forming an obsolete, subterminal band; outer feathers with more or less white near base of inner web, outermost one almost entirely white, except for a slight shade of smoky brown and a slightly indicated subterminal shade of darker brown; hinder crown light brown, entirely surrounded by pale cinnamon-rufous, which occupies fore part of crown and extends down sides of neck round hinder neck, where it forms a broad collar of pale cinnamon-rufous; base of forehead white, followed by a narrow black band; lores black; feathers in front of and below the eye black; which unite with a black band along top of ear-coverts; sides of face and under surface of body white; across fore neck and chest a broad band of cinnamon-rufous or light