868 
Birds of Celebes; Anatidae. 
This species has its closest affinities with Nettopus albipennis Gould of 
Australia which according to Count Salvadori (2) differs only by its larger 
size and is considered by him as doubtfully distinct. The differences between 
N, coromandelianus and pulchellus have been pointed out in our article on the 
latter species. One other species of the genus Nettopus is known — N. auritus 
(Bodd.) of Africa and Madagascar. 
The habits of the present bird are interestingly described by Kelham (c 10) 
and by Legge (c 8). It is said to be a very bad walker, and the former ob- 
server could not recall a case of having seen it on dry ground. The cry is 
described as Goose-like. 
GENUS DENDROCYCNA Sw. 
The Tree Ducks are furnished with a longer hallux than is usual among 
Ducks, being with the claw Vi the length of the tarsus or more; toes long; 
tarsus about % the length of the middle toe and claw, covered in front with 
small reticulate scales; no wing-speculum; exposed culmen slightly shorter than 
the tarsus; size medium. Sexes alike. 
Range; the tropical parts of the World. . 
369. DENDROCYCNA ARCUATA (Horsf.). 
Black-spotted Tree Duck. 
a. Anas arcuata (I) Horsf., ZoOl. Research, in Java 1822, pi. 65; (2) Finsch, Heu Guinea 
1865, 183. 
b. Dendrocygna arcuata (I) Gld., B. Austr. (1846) VH, pi. 14; (II) Diggl., Om. Austr. 
(1870) pi. 114, f. 2; (3) Salvad., TJcc. Borneo 1874, 362, pt.; (4) W. Bias., J. f. 0. 
1884, 212, 216, 219, 221; (5) id., Ztschr. ges. Om. 1886, 171; 2(6) Hagen, T. Red. 
Aard. Genoots. 1890, (2) VH, 168; (7) Wiglesw., Aves Polyn. 1892, 69; (8) Grant, 
Ibis 1895, 267; (9) M. & Wg., Abb. Mus. Dresden 1896, Nr. 1, p. 15; (10) Sarasin, 
Z. G. Erdk. Berbn 1896, XXXT, 15'; (11) Hartert, Nov. Zool. 1896, 590; (12) id., 
ib. 1897, 166. 
c. Dendrocygna vagans (I) Fraser, Zool. Typ. pi. 68 (1849); (2) Scbb, Mus. P.-B., Anseres, 
1866, 88; (3) Finsch & Hartb, Orn. Centralpolyn. 1867, 211; (4) Wald., Tr. Z. S. 
1872, ynr, 102 ; (5) id., ib. 1875, IX, 242; (6) Brugg., Abb. Ver. Bremen 1876, 
V, 98; (7) Tweedd., P. Z. S. 1877, 834; (7>‘‘^) id., ib. 1878, 346, 712; (8) Rosenb., 
Malay. Archip. 1878, 279; (9) Meyer, Ibis 1879, 144; (10) W. Rams., Tweedd. Om. 
Works Index 1881, 660; (11) W. Blasius, J. f. 0, 1883, 133; (12) Vorderman, 
N. T. Ned. Ind. 1887, XLVI, 222, 240; (13) Rams., Tab. List 1888, 22; (14) Steere, 
List Coll. B. & M. Pliifipp. Is. 1890, 27; (15) Bourns & Worces., B. Menage Exped. 
1894, 32. 
d. Dendrocygna gouldi (Bp.); (1) Gld., Hb. B. Austr. 1865, H, 374. 
e. Anas vagans (1) Finsch, Neu Guinea 1865, 183; (2) Rosenb., Zool. Garten 1881, 168. 
f. Dendrocycna vagans (1) Sclat., P. Z. S. 1880, 510. 
Dendrocycna arcuata (1) Salvad., Om. Pap. 1882, HI, 385; (2) Meyer, J. f. O. 1892, 265; 
(3) id.. Abb. Mus. Dresden 1893, Nr. 3, p.29; (4) Salvad., Cat. B. 1895, XXVH, 153. 
