134 ANSEBES ANAS 



6'. Bill slaty with black on the culmen, legs 



yellow, webs black A. syarsa, p. 136. 



c'. Bill crimson with base and edges black, 



legs dirty yellow N. capense, p. 138. 



5. Speculum salmon pink. 



a.' BiU pink with a brown central stripe ; 



legs dirty grey P. erythrorhyncha, p. 141. 



B. Smaller, wing about 6 ; speculum bright 



green; bill black and leaden N. punctatmn, -g. 139.- 



619. Anas undulata. Geelbec or Yellow Bill. 



Anas flavirostris {nee Vieill.) Smith, Cat. S. A. Mus. p. 36 (1837) ; id. 

 Illiistr. Zool. S. A. Aves, pi. 96 (1844) ; Laijard, B. S. Afr. p. 352 

 (1867); Giirney, Ibis, 1868, p. 49 [Natal]; Buckley, Ibis, 1874, 

 p. 390 ; Bryden, Gun and Camera, pp. 349, 404 (1893). 



Anas undulata, Dubois, Orn. Call. p. 119, pi. 77 (1839) ; Salvadori, 

 Cat. B. M. xxvii, p. 212 (1895) ; Shelley, B. Afr. i, p. 172 (1896) ; 

 Woodward bros.. Natal B. p. 209 (1899) ; Beichenow, Vog. Afr. i, 

 p. 113 (1900) ; Marshall, Ibis, 1900, p. 269 ; Oates, Cat. B. Eggs ii, 

 p. 165, pi. vi, fig. 5 (1902) ; Shortridge, Ibis, 1904, p. 207. 



Anas xanthorhyncha, Forst., Descr. An. p. 45 (1844) ; Pelzeln, Novara 

 Beise, Vogel, p. 138 (1865) ; Gurney, in Andersson's B. Damaral. 

 p. 342 (1872) ; Ayres, Ibis, 1874, p. 105, 1880, p. 272 ; Oates, 

 Matabeleland, p. 327 (1881) ; Shelley, Ibis, 1882, p. 368 [Mashona- 

 land] ; Kolub d Pelzeln, Orn. Slid- Afr. p. 329 (1882); Butler^ 

 Feilden andBeid, Zool. 1882, p. 427 ; Sharpe, ed. Layard's B. S. Afr. 

 p. 755 (1884) ; Nicolls and Eglington, Sportsm. S. A. p. 127, pi. xii, 

 fig. 60 (1892) : Fleck, Journ. Ornith. 1894, p. 381. 



Description. Adult male. — General colour dark ashy-brown, the 

 head and neck finely streaked with whitish ; the feathers of the 

 upper part of the body narrowly, those of the lower broadly edged 

 with white, so that the whole bird has a mottled appearance ; 

 primaries dark brown, outer secondaries metallic-green or blue on 

 the outer web, forming a conspicuous speculum, a few of the inner 

 secondaries rich velvety black on the outer web forming a margin 

 to the speculum ; tail of sixteen feathers, which are rather narrow 

 and pointed, especially the central pair. 



Iris hazel ; bill yellow, black along the middle of the culmen 

 and at the tip ; legs black. 



Length 22-5 ; wing 9-7 ; tail 3-0 ; culmen 2-0 ; tarsus 1-5. The 

 sexes are alike. 



Distribution. — This is certainly the commonest Duck throughout 

 the greater part of South Afrida, and is found everywhere except 



