230 AVES: ANSERES. — XXXV. 
351. ANAS Linneus. (Lat., duck.) 
a. Culmen longer than middle toe without claw. 
b. Speculum violet, bordered with black ; bill greenish-yellow; L. more . 
than 20. (Anas.) 
688. A. boschas L. Martitarp Duck. Tame Duck. ¢ head 
and upper neck rich glossy green, a white ring below; breast 
purplish chestnut; speculum violet, with black and white before 
and behind it; 9 duller, chiefly dull ochraceous, streaked with 
dark brown. L. 24. W. 12. N. Am., abundant; commonest 
westward. Original of the common domestic duck; various hy- 
brids of this species with others are described. (Hu.) (Sockas, 
mallard.) 
689. A. obscura Gmelin. Brack Duck. Size of mallard and 
resembling the 9, but darker; both sexes entirely dusky, varied 
with brown; no decided white except under the wings. E. U.S., 
common W. to Iowa. 
bb, Speculum green; bill dusky; L. less than 20. 
c. Wing-coverts in both sexes sky-blue, the greater white tipped ; scapu- 
lars in gf striped with blue and buff; bill rather broad; head not 
crested. (Querquedula Stephens.) 
690. A. discors L. BLuUE-winNGED TEAL. ¢ head and neck 
blackish plumbeous, darkest on the crown; a white crescent in 
front of eye; under parts thickly spotted; 9 dull streaky brown- 
ish and buffy, known by the wings. L.16. W.7. T.3. E.U.S., 
W. to Rocky Mts., abundant. (Lat., discordant.) 
691. A. cyanoptera Vieillot. Crnnamon TeaAL. ¢ chiefly 
chestnut; top of head blackish; 9 dull and streaky. L.17. W. 
74. S.W., straying E. to Ill. (xvavos, blue; mrepov, wing.) 
cc. Wing coverts leaden gray, without blue; scapulars waved with black 
and white; bill very narrow; head slightly crested. (Vettion 
Kaup.) 
692. A. carolinensis Gmelin. GREEN-WINGED TEAL. Head 
and upper neck rich chestnut in g; a green patch behind eye; 
upper parts with wavings of black and white; white below; buffy 
on breast, with dark spots; Q different, known by the small size 
and color of wing; white crescent on sides in front of wings. 
L.15. W.74. T. 353. N. Am., common; one of the best of the 
ducks as food. 
aa. Culmen shorter than middle toe without claw. 
d. Lamellze numerous, fine, more than 30 visible from outside; bill not 
shorter than head. (Chaulelasmus Bonaparte.) 
693. A.strepera L. GADWALL. Gray Duck. ¢ barred, black 
and white, middle wing coverts chestnut, greater coverts black, 
speculum white; 9 dusky and tawny with little chestnut, known 
