ABT. 16. BIRDS FROM NORTH CELEBES RILEY. 33 



Family ANATIDAE. 



DUCKS, GEESE, ETC. 

 61. DENDROCYGNA ARCUATA ARCUATA (Horsfield). 



Six males and four females, Paleleh, Xovembcr 12 and 13, 1914; 

 two males and one female, Likoepang, February 23-25, 1916. 



The United States National Museum possesses only two unsexed 

 Australian specimens of this duck, amongst a large series from the 

 wide range of the species. These seem to have lighter and more 

 heavily spotted breasts than birds from the northern parts of its 

 range. 



Mathews ^^ has rejected Anas arcuata because Horsfield ^^ only In- 

 tended to rename or rather use what he considered an earlier manu- 

 script name of Cuvier for his Anas javatiica,'^'^ but Horsfield de- 

 feated his purpose when he published a named plate and diagnosis of 

 an entirely different species. Salvadori ''^ was correct in accepting 

 Horsfield's name for the present species founded upon the plate. As 

 De7idrocy(/na arcuata and javanica are perfectly distinct species, 

 both occurring in Java, and as the Australian form is a race of the 

 former, it will become Dendrocygna arciiata australis Reichenbach.''^ 



62. DENDROCYGNA GUTTATA Schlegel. 



One male and one female, Likoepang, January 19, 1916. 

 The first description of this duck is apparently tliat of Schlegel; ^^ 

 all previous uses of the name being nomina nuda. 



63. ANAS SUPERCILIOSA PERCNA Riley."* 



Two males and two females, Dolo, December 26, 1916; one male, 

 Winatoe, January 21, 1917; three males, two females, and downy 

 young, Koelawi, February 2-3, 1917; one male, Rano Lindoe, March 

 13, 1917. 



This series, while showing quite a little variation, agrees in being 

 darker and smaller than the Australian form {Anas superciliosa 

 rogersi) ; the throats are noticeably of a deeper bulf, more pinkish. 



There is apparently no difi^erence in the sexes worth mentioning, 

 even in size. The seven males measure: Wing, 240-266 (249.3); 

 tail, 86-107.5 (97.4) ; culmen, 45-52.5 (49) ; tarsus, 42-45 (43.3) ; 



BSNov. Zool., vol 18, 1911, p. 9. 



B»Zool. Research. Java, 1824, pi. 64. 



•» Trans. Zool. Soc. Loud., vol. 13, 1821, p. 199. 



«» Cat. Birds Br. Mus., vol. 27, 1895, p. 153. 



«2Nov. Syn. Av., No. 4, Dec, ISoO, [4], pi. 335, fig. 2650-51, ex Gould. 



MMus. Pays-Bas, vol. 6, No. 31, liv. 8, 1866, p. 85. 



«*Proc. Biol. Soc. Wash., vol. 32, 1919, p. 93 (Koelawi, Celebes). 



