204 ANATIDE. 
Subfam. ANATIN. 
This subfamily comprises most of the Ducks, including the Tree-Ducks (Dendro- 
cycna), the Sheld-Ducks (Tadorna and Casarca), the typical Ducks (Anas), and several 
other well-known forms, such as the Wigeon (Mareca), the Teal (Nettium), &c. All 
these birds have the hind toe very narrowly lobed, and usually show a metallic speculum 
on the wings, according to Count Salvadori, who also states that the males have a bulla 
ossea on the larynx. 
Nearly every genus belonging to this subfamily is represented within the Central- 
American area, which is visited by numerous migrants from the high north after the 
breeding-season. Few of the species appear to be resident. 
DENDROCYCNA. 
Dendrocygna, Swains. Class. Birds, 11. p. 365 (1837). 
Dendrocyena, Scl. P. Z. 8. 1880, p. 508 (nomen emend.); Salvad. Cat. Birds Brit. Mus. xxvii. 
p. 144 (1896) ; Oates, Man. Game-Birds Brit. Ind. 11. p. 110 (1899). 
The Whistling-Ducks (Dendrocycna) differ from all other genera of the Anatinze 
in having the tarsus rather elongated, and its lower portion covered in front with small 
reticulate scales in place of the row of transverse scutelle. ‘The general tint of the 
plumage is rufous, and the primary-quills, axillaries, and under wing-coverts are 
black. : 
‘The sexes are similar in plumage and do not differ much in size. ‘The only moult 
takes place in autumn. Of the nine known species of the genus, tive occur in America, 
but only two are found within our limits. 
1. Dendrocycna fulva. — 
Anas fulva, Gmel. Syst. Nat. i. p. 530’; Wagl. Isis, 1831, p. 532°. 
Dendrocygna fulva, Lawr. Mem. Bost. Soc. N. H. ii. p. 313°; Scl. & Salv. P. Z. S. 1876, 
p. 872‘; Herrera, La Nat. (2) i. pp. 187°, 329°; A.O. U. Check-l. N. Amer. Birds, 2nd 
ed. p. 647. 
Dendrocycna fulva, Baird, Brewer, & Ridgw. Water-Birds N. Amer. i. p. 484°; Salvad. Cat. Birds 
Brit. Mus. xxvii. p. 149°. 
Supra brunnescenti-nigra, plumis dorsalibus et scapularibus cinnamomeo late marginatis ; tectricibus alarum 
minoribus castaneis ; remigibus, cum axillaribus et subalaribus, nigris; supracaudalibus albicanti-fulvis ; 
pileo rufescenti-brunneo ; capite et collo reliquo rufescenti-cinnamomeis ; corpore reliquo subtus pallide 
castaneo, hypochondriis longioribus fascia longitudinali flavescenti-alba, fusco marginata, ornatis; fascia 
nigra ab occipite per collum posticum producta ; collo medio albo, fusco striolato ; subcaudalibus albescenti- 
fulvis: rostro et pedibus saturate plumbeis ; iride brunnea. Long. tota circa 20-0, ale 9-0, caude 2:3, 
culm. 1-95, tarsi 2-4. (Descr. maris adulti ex Corpus Christi, Texas, Mus. nostr.) 
mari similis. Long. tota circa 20-0, alee 8-1, culm, 1°65, tarsi 2-1. 
Juy. adultis similis, sed subtus pallidior, supracaudalibus anguste brunneo marginatis ; tectricibus alarum vix 
castaneis. 
