440 



Genus CHAULELASMUS, Gray apud Bonap., 1838. 



This is a genus generally admitted, but distinguished from Anas 

 by characters of secondary importance. The bill is similar in shape, 

 though smaller, and the lamellae are more developed. The speculum 

 is black and white. Tail of 16 feathers. 



One species with a wide range occurs in India. The only other 

 species referred to the genus is very little known. 



- 

 1595. Chaulelasmus streperus. The Gadwall. 



Anas strepera, Linn. Si/st. Nat. i, p. 200 (1766) ; Bluth, Birds 



Burm. p. 166; Fairbank, S. F. iv, p. 264; Scully, Ibis, 1881, 



p. 592. 

 Chauliodus strepera, Swains. Jour. Roy. Inst. ii, p. 19 (1831) ; 



Jerdon, Madr. Jour. L. S. xii, p. 220. 

 Chaulelasmus streperus, Bonap. Comp. List B. Eur. fy N.Amer. p. 56 



(1838) ; Blyth, Cat. p. 304 ; Jerdon, B. I. iii, p. 802 ; Godw.-Aust. 



J. A. S. B. xxxix, pt. 2, p. 275 ; Stoliczka, J. A. S. B. xli, pt. 2, 



p. 255 : Hume $ Henders. Lah. to Yark. p. 296 ; Hume, S. F. i, 



p. 261 ; Adam, ibid. p. 402 ; Butler, S. F. iv, p. 29 ; Davids, fy 

 Wend. S. F. vii, p. 92 ; Ball, ibid. p. 232 ; Hume, ibid. p. 493 ; 



id. Cat. 110. 961 ; Scully, S. F. viii, p. 362 ; Hume $ Marsh. Game 



B.iii, p. 181, pi. ; Vidal,S.F. ix, p. 92; Butler, ibid. p. 438; 



Reid, S. F. x, p. 82 ; Davidson, ibid. p. 325 ; Hume, ibid. p. 418 ; 



Taylor, ibid. p. 531 ; Oates, B. B. p. 283 ; Barnes, Birds Bom. 



p. 405 ; Hume, S. F. xi, p. 345 ; St. John, Ibis, 1889, p. 179 j 



Salvadori, Cat. B. M. xxvii, p. 221. 



Mila, Bhuar, Beykhur, H. ; Peing-hdns, Beng. ; Mail, Nepal ; Burd, 

 Sind. 



Fig. 113. Bill of C. streperus. . 



Coloration. Male. Head and neck greyish white, speckled with 

 brown, crown chiefly brown ; a slight dark band running back from 

 each eye ; lower neck and upper back dark brown, with concentric 

 whitish bars ; scapulars brown, most of them vermiculated with 

 white or fulvous, the longest not vermiculated, pale-edged ; lower 

 back brown, sometimes vermiculated, passing into black on the 

 rump and upper tail-coverts ; tail-feathers and quills greyish brown, 

 outer webs of middle secondaries black, of last two or three white, 



