FULIGULA.] AVES NATATORES. 243 



Obs. The Collared Duck of Donovan*, is either a female or a young 

 male of this species, with a slight variation of plumage. The Ferru- 

 ginous Duck of Pennant is also probably referable to this species in 

 some one of its different states. 



254. F. dispar^, Steph. (Western Pochard.) White; 

 beneath ferruginous : forehead, and occipital band, green ; 

 orbits, throat, collar and back, black. 



F. dispar, Steph. in Shaw's Gen. Zool. vol. xn. part ii. p. 206. 

 Anas dispar, Gmel. Syst. torn. i. part ii. p. 535. Western Duck, 

 Penn. Arct. Zool. vol. n. p. 289. pi. 23. Lath. Syn. vol. in. p. 532. 

 Id. Supp. p. 275. Shaw, Nat. Misc. vol. i. pi. 32. Western Pochard, 

 Shaw, Gen. Zool. 1. c. Selb. lllust. vol. n. p. 360. pi. 66**. 



DIMENS. Entire length seventeen inches. LATH. 



DESCRIPT. (Male.) Crown, sides of the head and neck, and hind part 

 of this last for half-way, white ; across the forehead a band of pea-green ; 

 a transverse fascia on the nape of the same colour, but deeper, at the 

 lower corner of which, on each side, is a round black spot of the size of a 

 pea; behind the eye, another spot of the same colour, but irregular in 

 shape : chin, throat, and fore part of the neck, black, communicating with 

 a collar of the same which surrounds the neck about the middle ; from 

 the hind part of this the black passes down over the back, quite to the 

 tail : breast and sides pale ferruginous, deepening into chestnut at the 

 middle, growing still deeper as it passes on towards the vent, where the 

 colour is black: wing-coverts white; primary quills dusky black ; second- 

 aries six inches long, and curving downwards, partly white, partly black, 

 the colours divided obliquely on each feather; scapulars also long, and 

 curving elegantly downwards over the greater coverts, as in the Gar- 

 ganey ; each of these has the web next the body scarcely broader than 

 the shaft itself, and both of them white; the other web very broad, and 

 black : tail pointed, brown : bill and legs black. LATH. (Female.) The 

 whole plumage mixed brown and ferruginous, not unlike that of the 

 Woodcock : the quills all straight, and of a dusky colour ; some of the 

 secondaries with white tips, forming a spot on the wing; some of the 

 wing-coverts also tipped with white: legs black. LATH. (Egg.) Un- 

 known. 



Only one individual of this species has hitherto occurred in Britain. 

 This, which was a male specimen, is recorded to have been shot at Caistor 

 near Yarmouth, in February 1830. It is now in the Norwich Museum. 

 Said to inhabit Kamtschatka, and the western coast of America, breeding 

 amongst rocks. Pennant states that it flies in flocks, and never enters 

 the mouths of rivers. 



255. F. Marila, Steph. (Scaup Pochard.) Head 

 and neck black, glossed with green ; back and scapulars 

 whitish, with undulating black lines ; belly, flanks, and 

 speculum on the wing, white ; bill blue ; legs ash-colour. 



* Brit. Birds, vol. vi. pi. 147. 



t I have followed Stephens and Selby in referring this species to the present genus, until its 

 true situation be determined. It may be questioned, however, whether it be not more properly 

 an Oidemia. 



Q2 



