92 NOIiTir AMFRICAX BIRDS. 



markings; lower basal angle of upper mandible with 

 a triangular black spot; Rpeculuin UMualh- bluish 

 green ; about the size of yl. obscura. Eijgs 2.15 X 1-61, 

 pale dull buff or pale grayish buff. ]Iab. Southeastern 

 United States, from Florida to Kansas. 

 (10.) 134. A. fulvigula IJiDciw. Florida Duck. 



e'. AVing with one or more white band.s. 



/'. Wing more than 8.75, with two white bands. 



Chin, throat, and lower part of cheeks plain bulT^- ; 

 dusky prevailing on upper parts, lower parts with 

 dusky and ochraceous in about equal proportion ; 

 wing 8.90-10.00, culmcn 1.85-2.05, tarsus 1.60, 

 middle toe 1.95. Hub. Southern Mexico (Puebla, 

 etc.). 



A. diazi lliDow. Mexican Duck.' 

 /'. Wing less than 8.75, with only one white band. 



Only the chin and upper part of throat unstreakcd 

 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, b3' a velvet}' black 

 Bubterminal and a pure white terminal bar, each 

 about .35 wide ; wing 8.50, culmen 1.65, tar.^us 

 1.30, middle toe 1.70. Ilab. Western Mexico 

 (vicinity of Mazatlan). 



A. aberti Eidqw. Aberl's Duck.' 

 c'. Wing less than 8.00 ; scapulars and tertials lanceolate, and marked 

 with buff}' 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 bronzj- greenish.) (Subgenus 

 Querqucdula STErnENS.) 

 d}. Culmen usually less than 1.65. Adult male: Head and neck dull 

 plumbeous, with a largo crescent-shaped patch of white in 

 front of e3'e, faint gloss of metallic lavender-purple on sides of 

 occiput, the crown dusky; lower parts pale chestnut, spotted 

 with black. Adult femala (and adult wale in breeding season) : 

 Above dusky, varied with dull huffy ; 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 

 (especialh' 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 



• Anat dia:i Rmow., Auk, iii. July, 18R«, 3.'!2. 



> Anaa abcrii RiDOW., Proc. U. S. Nat. Mus. i. 1S78, 2i0. 



