INDIAN DUCKS AND TUEIR ALLIES. 243 



Tho diffoM-ODcos l)otween Nettlon and Anas, ChanleUwnus and M<u-eca 



have lieon already pointed out. 



Key to the Species. 



Speculum, secondaries bronze-green at base, then 

 black and tipped white, and with their coverts 

 tipped rufous (I) N. formosum. 



Speculum. Outermost secondaries black witli white 

 tips, those next them brilliant metal-green, next 

 again to them one black, the remainder like 

 back (2) N. CRECCA. 



Speculum. Outer secondaries black exGe]>t two or 

 three in the centre, 7" to 9" which are bronze- 

 green (3) N. ALBIGDLARK. 



24. Nettion formosum. 

 The Baikal or Cluching Teal. 

 Querquednla glocitaus, Jerdon, *' Birds of India," III, p. 808 ; Hume, 

 '*Str. Feath,"VIlI, p. 412. 



Querquedula formosa, Hume, *' Str. Feath.," VII, p. 494 ; id., 

 VIII, pp. 115, 404 ; id., iyA., No. 9G0 ; Hume and Marsball, " Game 

 Birds," III, p. 225 ; Barnes, *' Birds of Bombay," p. 411. 

 JSettion formosum^ Blanford, " Birds of India," IV, p. 442. 

 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 buff, tho 

 butF parts narrowly margined 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 behind the eye a broad glossy green band, of a crescentic 

 shape, passes along the sides of the head and inforiorly changes into 

 black, between the buff colour anteriorly and white band posteriorly ; 

 back and scapulars grey, somewhat tinged with brown, minutely 

 vermiculated with black, the inner scapulars elongated lanceolate, 

 on the outer web black, edged with cinnamon, silky buff, edged 

 with brown oa the inner web ; lower back and rmnp greyish-brown ; 

 the upper tail coverts brown, edged with rufous ; lower neck and 

 upper l)reast vinous, marked with small oval black spots ; on tho 

 sides of the breast, just before the liond of the wing, a crescentic white 

 2 



