ANAS CHA ULELASMUS 605 



in a hollow tree, or the deserted nest of some large bird. The 

 eggs from 7 to 12 or even 15 are dull greenish grey, and 

 measure about 2*29 by 1'61. 



843. RING-BILLED DUCK. 

 ANAS ZONORHYNCHA. 



Anas zonorhyncha, Swinlioe, Ibis, 1866, p. 394; David and Oust. Ois. 

 Chine, p. 496 ; Seebohm, B. Jap. Emp. p. 243 ; Salvador!, Cat. B. 

 Br. Mus. xxvii. p. 211 ; Tacz. F. t). Sib. 0. p. 1133 ; A.pacilorhyncha, 

 Temm. and Schleg. Faun. Jap. Aves. p. 126, pi. 82 (nee. Forst). 



Kari-gamo, Jap. 



ad. (Japan). Not unlike the female A. boscas, but has a superciliary 

 stripe ; sides of the head and throat whitish, the rump and upper tail- 

 feathers uniform dark brown ; lower neck and upper breast dull whitish 

 buff with dusky centres to the feathers ; lower breast and abdomen brown, 

 the under tail-coverts blackish brown ; speculum glossy blue with a 

 greenish tinge ; bill black with the apical portion, except the tip of the 

 nail, yellow ; legs and feet light bright red ; iris yellowish brown. 

 Culmen 2 -2, wing 11 '6, tail 4'8, tarsus 1'75 inch. Sexes alike. 



Hob. Mongolia, Dauria, China, Corea, Japan, and the Kurile 

 Islands. 



In its habits it is said to resemble A. boscas. It breeds in 

 South-east Mongolia, northern China and Japan in May or 

 early in June, nesting on the ground, and depositing 5 to 6 

 eggs, which are ivory-white and measure about 2*13 by 1*55. 



CHAULELASMUS, Gray apud Bp., 1838. 



844. GAD WALL. 

 CHAULELASMUS STREPERUS. 



Chaulelasmus streperus (Linn.), Syst. Nat. i. p. 200 (1766) ; (Naum.), xi. 

 p. 659. Taf. 302 ; figs. 1, 3 ; (Hewitson), ii. p. 402, pi. cxiii. fig. 1 ; 

 (Gould), B. of E. v. pi. 366 ; id. B. of Gt. Brit. v. pi. 19 ; Dresser, 

 vi. p. 487, pi. 424 ; David and Oust. Ois. Chine, p. 499 ; (Audubon), 

 B. Am. vi. p. 254, pi. 388 ; Salvador!, Cat. B. Br. Mus. xxvii. p. 221 ; 

 Tacz. F. 0. Sib. 0. p. 1154 ; Blanf. F. Brit. Ind. Birds, iv. p. 440 ; 

 (Seebohm), B. Jap. Emp. p. 242 ; Saunders, p. 425 ; (Lilford), vii. 

 p. 87, pi. 34 ; (Kidgway), p. 95. 



Chipeau bruyant, French; Frisada, Portug. ; Trigali, Pato 

 castellano, Span. ; Canapiglia. Ital. ; Schnatterente, German ; 

 Kraakeend, Dutch ; Snadderand, Dan. ; Snatterand, Swed. ; 



