ie) 
bo 
(10.) 
NORTH AMERICAN BIRDS. 
markings; lower basal angle of upper mandible with 
a triangular black spot; speculum usually bluish 
green; about the size of A. obscura. Eggs 2.15 X 1.61, 
pale dull buff or pale grayish buff. Hab. Southeastern 
United States, from Florida to Kansas. 
134. A. fulvigula Ripew. Florida Duck, 
e. Wing with one or more white bands. 
f'. Wing more than 8.75, with two white bands. 
Chin, throat, and lower part of cheeks plain buffy ; 
dusky prevailing on upper parts, lower parts with 
dusky and ochraceous in about equal proportion ; 
wing 8.90-10.00, culmen 1.85-2.05, tarsus 1.60, 
middle toe 1.95. Hab. Southern Mexico (Puebla, 
etc.). 
A. diazi Ripaw. Mexican Duck? 
f?. Wing less than 8.75, with only one white band. 
Only the chin and upper part of throat unstreaked 
buff; dusky and ochraceous markings nearly 
equal in extent, the latter, however, rather pre- 
dominating on lower parts; speculum dark metal- 
lic green, followed, successively, by a velvety black 
subterminal and a pure white terminal bar, each 
about .35 wide; wing 8.50, culmen 1.65, tarsus 
1.30, middle toe 1.70. Hab. Western Mexico 
(vicinity of Mazatlan). 
A. aberti Ripaw. Abert’s Duck.? 
¢, Wing less than 8.00; scapulars and tertials lanceolate, and marked 
with buffy or whitish median stripes in adult males. (Lesser wing- 
coverts plain light bluish, last row of middle coverts white spotted 
or blotched with dusky, speculum bronzy greenish.) (Subgenus 
Querquedula STEPHENS.) 
@, Culmen usually less than 1.65. Adult male: Head and neck dull 
plumbeous, with a large crescent-shaped patch of white in 
front of eye, faint gloss of metallic lavender-purple on sides of 
occiput, the crown dusky; lower parts pale chestnut, spotted 
with black. Adult female (and adult male in breeding season) : 
Above dusky, varied with dull buffy; head, neck, and lower 
parts dull brownish white, or pale dull buff, the head and neck 
streaked with dusky (except on chin and upper throat), the 
lower parts more or less spotted with same, the belly sometimes 
(especially in younger birds) immaculate. Young: Similar to 
adult female, but whole belly immaculate, and speculum dull 
grayish brown, without metallic gloss. Length 14.50-16.00, wing 
1 Anas diazt Rinew., Auk, iii, July, 1886, 332. 
3 Anas aberti Ripew., Proc. U. 8. Nat. Mus, i, 1878, 250. 
