DENDROCYGNA. 119 



fulvous and dusky ; lower parts dull whitish, irregularly spotted with 

 black. Hah. West Indies (Jamaica and St. Groix). 



D. arborea Linn. Tree-duck.* 

 a^. Plumage chiefly uniform, in distinctly defined areas of different colors. 



b^. Belly plain light tawny-cinnamon, or fulvous, the flanks striped with 

 paler. 



Adult : Back and scapular region black, the feathers tipped with ful- 

 vous or cinnamon; upper tail-coverts white ; head and neck plain 

 tawny, like lower parts, the top of head and hind-neck darker; 

 bill black ; length about 20.00-21.00, wing 8.10-8.90, culmen 1.65- 

 1.95, tarsus 2.10-2.40, middle toe 2.30-2.80. Hab. Tropical and 

 subtropical North America, north to California, Nevada, and Louisi- 

 ana ; also, southern Brazil, Paraguay, and Argentine Eepublic. 



178. D. fulva (Gmel.). Fulvous Tree-duck. 

 6*. Belly uniform black. 



&. Under tail-coverts white, spotted with black ; bill light-colored (red in 

 life) ; above reddish brown, the rump and upper tail-coverts 

 black. 

 d}. Adult : Lower part of neck, all round, and chest, reddish brown, or 

 cinnamon, like the back. Young : Similar, but pattern of color- 

 ation much less distinct, and colors duller ; the reddish brown 

 replaced by dingy grayish, tinged with rusty, the belly, flanks, 

 etc., grayish white, tinged with dusky; bill and feet dusky. 

 Downy young : Above blackish brown, varied by large, sharply 

 defined areas of sulphury buff; lower parts pale buff-yellow, 

 the belly whitish. Length 19.75-24.00, wing 9.20-9.70, cul- 

 men 1.90-2.15, tarsus 2.25-2.60, middle toe 2.25-2.70. Eggs 

 2.12 X 1.56, white, sometimes tinged with pale olive greenish or 

 buffy. Hah. Middle America, including Eio Grande Yalley in 

 Texas. 



177. D. autumnalis (Linn.). Black-bellied Tree-duck. 

 d}. Adult : Lower part of neck, all round, including chest, brownish 

 gray, abruptly contrasted with the chestnut-brown of the back. 

 Hab. Northern South America. 



D. discolor Scl. & Salt. Colombian Tree-duck.'^ 

 c^. Under tail-coverts uniform black. 



Adult : Chest and lower part of neck, all round, rich chestnut ; 

 sides yellowish white, barred with blackish ; fore part of head 

 white ; rest of head, and upper part of neck, black, with a white 

 patch on fore-neck. Hah. Eastern South America and western 



Africa. 



D. viduata (Linn.). Brazilian Tree-duck.s 



* Anas arborea Linn., S. N. ed. 12, i. IToO, 207. Dendrocyqna arborea Eyt., Mon. Anat. 1838, 110. 



2 Dendrocygna discolor ScL. <fe Salt., Nom. Neotr. IST.?, 161. 



3 Anas viduata Linn., S. N. ed. 12, i. 1766, 205. Dendrocygna viduata Eyt., Mon. Anat. 1838, 110. 



