anatid^ — anatinjE: biveb duces. 



689 



leucoparia Brdt? But not Uucoparia Cass. Not in the Check List, 1882, not having been 

 there formally recognized as a subspecies.) 



703. B. c. leucopari'a. (Gr. XevKos, leukos, white ; Trapeid, jMreia, cheek.) Smaller White- 

 cheeked Goose. Similar to the last in color; but much smaller, and taU 16-feathered, thus 

 resembling No. 704, from which distinguished as occidentalis is from canadensis. Length 24.IJ0 

 or less; wing about 15.00. This is the smaU " wliite-necked goose" iigured by Cassin, lU., 

 pi. 43, as B. leKCoparia, Brandt. Pacific coast, especially Alaska. 



704. B. c. hut'chinsi. (To Mr. Hutchins.) Hutchins' Goose. Tail normally 16-feathered. 

 Coloration as in the Canada goose. Size much less. Length 25.00-30.00; extent about 

 4 feet; wing 15.00-17.00; tail 5.00-6.00; bill 1.50; tarsus under 3.00. There seems little 

 probability of establishing good character of more than one species of the canadensis gi'oup, 

 with probably four varieties: large, no collar (702); small, no collar (704); large, collared 

 (702n) ; small, collared (703). 



283. DENDROCY'GNA. (Gr. SevSpov, dendron, a tree ; Lat. cygnus, a swan.) Tree Ducks. 



Duck-like arboricole geese, mth the bUl longer than the head, terminated by a prominent 



decurved nail, the lamellae not projecting ; nostrils small, oval, in basal half of bUl ; legs very 



long, the tibiffi extensively denuded below y hind toe lengthened, more than one-third as long 



as the tarsus ; tarsi entirely reticulate, as in geese proper. "Wings ample, rounded ; 1st quill 



shorter than 4th. Coloration variegated. Sexes similar. Nest in trees. In addition to the 



two following species, a third, B. arborea, of the West Indies, may occur in the South. 



Analysis of Species. 



Bill and feet blackish ; coloration largely cinnamon ; no white wing-patch fulva 705 



Bill and feet reddish ; coloration largely blackish ; a large white wing-patch autumnalis 706 



705. D. ful'va. (Lat. ftdm, fulvous, reddish.) FuLVOUS Tree Duck. Bill bluish-black ; 

 feet slaty-blue. Pale cinnamon or yellowish-brown, extensive and uniform on the lower parts, 

 darker on head ; nape and hind-neck with a black hne ; scapulars and fore-back blackish with 

 pale cinnamon edgings of the feathers. Rump and tail black ; upper and under taU-coverts 

 white. No white speculum on wing ; lesser wing-coverts chocolate-bro^vn ; rest of wing black 

 on both surfaces. Length about 20.00; extent 36.00; wing 9.50; tall 3.25 ; tarsus 2.25 ; bill 

 1.50, with hooked nail. S. W. U. S. and southward, in summer, Louisiana to Cala. ; common 

 on the Eio Grande. 



706. D. autumna'lis. (Lat. autumnalis or auctumnalis, of the period of increase, of harvest ; atictus, 

 increased, augmented.) Autumnal Tree Duck. Bill coral-red, with orange above, and 

 bluish nail; feet pinkish-white. A large white speculum, consisting of greater wing-coverts 

 and basal parts of most of the quills, as well as spurious quills and outer webs of one or two 

 primaries. Head and neck reddish-chocolate, paler on cheeks and chin, ^vith black stripe 

 down nape and hind-neck, passing through more yellowish-brown on the fore-parts of the 

 body to blackish on lower back, rump, tail, belly, sides of body and hning of wings ; flanks 

 and crissum mostly white. Length about 20.00; extent 36.00-38.00; wing 9.50-10.50; 

 tail 3.00; bill along gape 2.00; tarsus 2.25. S. and C. Am. and Mex. to Texas, abundant 

 from April to October on the Rio Grande, where called "cornfield duck; " a common market- 

 bird in some places. Nest in hollows of trees, often at a great distance from water, to which 

 the young are transported by the parents in the bill. Eggs 12-16, 2.10 X 1.50, of usual duck 

 shape, huffy- white.. 



67. Subfamily ANATIN>E : River Ducks. 



Tarsi scutellate in front ; hind toe simple (in Fuligidina;, the hind toe with a flap or 

 lobe.) This expression separates the present group from all the North American examples 

 of the foregoing and succeeding subfamihes, although it is not a perfect diagnosis. The neck 

 and legs are shorter than they average in geese, while the feet are smaUer than in the sea- 



44 



