ANATINzE — THE DUCKS — QUERQUEDULA. 
535 
with a central stripe of buff ; longer scapulars similar, the outermost feathers with the outer webs 
light blue ; lesser wing-coverts plain light blue ; middle coverts dusky, tipped with white ; specu- 
lum uniform green, varying from metallic grass-green to bronze ; primaries and primary-coverts 
dusky ; upper tail-coverts dusky, edged with pale fulvous ; reetrices dusky, edged with brownish 
white or pale brownish gray ; axillars immaculate pure white. Bill deep black ; iris orange ; 
feet orange, joints and webs blackish. Adult female : Similar to that ol Q. discors, but larger and 
Q. cyanoptera. 
deeper colored, only the upper part of the throat (sometimes only the chin) unstreaked, the abdo- 
men usually distinctly spotted ; jugulum deeply tinged with light brown. Young male : Similar 
to the adult female, but markings on the lower parts all distinctly longitudinal, or streak-like. 
Downy young : 1 Above, dark olivaceous, relieved by a longitudinal oblong oblique spot of deep 
greenish buff on each side the back (behind 
the wings), and a similar spot of clearer yel- 
lowish on each side of the base of the tail ; 
the anterior spots confluent with the yellow 
of the sides, the posterior ones isolated by the 
extension beneath them of the olivaceous of 
the tail. Pileum and nape similar to the back, 
but darker ; forehead, broad superciliary strfpe, 
and rest of the head and neck, except as de- 
scribed, with entire lower parts, deep yellow- 
ish buff, the side of the head marked with a 
distinct narrow stripe of dark brown extend- 
ing from the upper base of the maxilla to the 
eye, thence back to the occiput. 
Total length (adult), about 15.50-16.50 
inches ; extent, 24.00-24.50 ; wing, 7.20-7.75 ; 
culrnen, 1.65-1.85 ; tarsus, 1.25-1.35; middle Male (i nat. size). 
toe, 1.40-1.50. 
Examples from Chili and Buenos Ayres are larger and more richly colored than those from the 
Western United States ; the white bar across the end of the middle coverts narrower, and nearly 
concealed by the overlying last row of lesser coverts. These' differences, however, may not prove 
constant. 
The female of this species is very difficult to distinguish from that of Q. discors, and it is prob- 
ably not possible always to separate them with certainty. The present species averages consid- 
erably larger, however ; the wing in the adult female ranging from 7.20 to 7.50 inches, the culrnen 
1.70 to 1.75, against 6.70 to 7.00, and 1.40 to 1.50, as in Q. discors. The colors are also deeper, 
1 Described from No. 77549, Washoe Lake, Nev., June 2, 1877 ; H. W. Henshaw. 
