“Tree-Ducks” of the genus Dendrocygna. 5 
and so on, in order that future students of this material may know 
of the identical skins or skeletons I had before me for description 
and comparison in the present connection. 
To some of the skins of this genus of ducks, belonging to the 
collections of the U. S. National Museum, which were sent to my 
home for examination, I gave especial attention, and of them I made 
colored drawings, which drawings are here reproduced in Plates 1—2. 
It will be observed that they illustrate — either by the entire bird 
or by the head — every species found in the genus at the present 
time. This list is as follows, — the numbers given being the cata- 
logue numbers of the U. S. National Museum; and where the name 
of the collector is not given, or the sex, such information in regard 
to any particular specimen was not known. 
Dendrocygna viduata. &. Brazil, Exploration of the Parana, Captain 
T. J. Paz, U.S.N., coll. July, 1859, 16540 (Plate 1 Fig. 1). 
Dendrocygna arcuata. New South Wales, Australian Museum, 121512 
(Plate 1 Fig. 2). 
Dendrocygna javanica. &. Tenasserim, May 17, 1879, ©. T. BINGHAM, 
95526 (Plate 1 Fig. 3). 
Dendrocygna discolor. &. Diamantina COreek, Brazil, June 17, 1887, 
C. B. Rıkers, 121111 (Plate 1 Fig. 4). 
Dendrocygna guttulata.. 2 ad. Zamboanga, Mindanao, March 17, 1906, 
EDGAR A. MEARNSs, 200815 (Plate 1 Fig. 5). 
Dendrocygna eytoni. &. N. S. Wales, 71635 (Plate 1 Fig. 6). 
Dendrocygna eyloni. 9. do., 71635 (Not figured). 
Dendrocygna arborea. (2 on orig. label, & on Nation. Mus. label), Barbuda 
W. L, H. G. S. BrancH, Nov. 16, 1903 (Plate 1 Fig. 7). 
Dendrocygna bicolor. @ ad. Unlucky Lake, San Diego, Cal., Dr. EnGArR 
A. MEARNS, Apr. 30, 1894, 135590 (Plate 2 upper figure). 
Dendrocygna bicolor. Q ad. do. (Not figured). 
Dendrocygna bicolor. New Madrid, Mo., F. W. SPARKs, „Autumn 1890, 
120308 (Not figured). 
Dendrocygna autumnalis. &. Lomita, Texas, GEORGE B. SENNETT, 
July 31, 1880, 112428 (Plate 2, lower figure). 
Dendrocygna autumnalis. Q ad. La Palma, Costa Rica, ©. C. NUTTING, 
87513 (not figured). 
As stated above, all of these species have been, in one place 
or another, more or less fully described in so far as their external 
characters are concerned. In all, I found the legs to be unusually 
long; the tibiae more or less extensively exposed below; hind toe 
