162 INDIAN DUCKS. 



Genus NETTION. 



The genus Js^etthnn or Settion is one of the largest in the order 

 Chenomorphse. As restricted hy Salvadori, there are seventeen species 

 contained in it, o£ which three only are found in India. The range of 

 the genus is cosmopolitan, and it contains species both resident and 

 migratory, both of which are represented in India. 



The differences between Nettion and Anas, Chaidelasmus and Mareca 

 have been already pointed out. 



Kejj to Species. 



Speculum, secondaries bronzed green at base, then black and 



tipped white, and with their coverts tipped rufous . . . N. forinosum. 



Speculum, outermost secondaries black with white tips, those 

 next them brilliant metallic green, next again to them 

 one black, the remainder like back N. crecca. 



Speculum, outer secondaries black except two or three in the 



centre (7 to 9), which are bronzed green JS\ aJbujulare. 



(28) NETTION FORMOSUM. 

 THE BAIKAL or CLUCKING TEAL. 



ftuerquedula glocitans, Jerdon, B. I. iii, p. SC^ ; Hume, Sir. Feath. viii, 



p. 412. 

 Querquedula formosa, Hume, Str. Feath. iii, p. 494; id. ibid, viii, pp. 115, 



494 ; id. Cat. no. 960 ; Hume Sf Mar. Game-B. iii, p. 225 ; Barnes, B. of 



Bom. p. 411. 

 Nettion formosum, Saluadori, Cat. B. M. xxvii, p. 240. 

 Nettium formosum, Blanford, B. I. i\, p. 442 ; Oates, Game-B. ii, p. 182. 



Description. Adult male. — " Crown of the head, back of the neck, entire 

 throat, and a band extending from the eye across the face to the throat, black ; 

 face and neck on the sides and under the throat butf, the buff parts margined 

 narrowly with white ; also the black crown from behind the eye is bordered on 

 each side with a white band which runs down the sides of the black nape, and 

 spreads on the sides of the neck ; from behiud the eye a broad glossy green band 



