398. BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 
and transversely spotted, or broadly barred, with the same, the paler 
spots shaded, more or less, with light grayish brown; tertials mostly 
nearly uniform grayish brown, usually with indistinct broad bars of 
darker; primary coverts and primaries dusky, margined terminally 
with white (except longer primaries), the four innermost primaries 
spotted along edge of outer web with dull brownish white; entire 
lower back and rump white, the feathers with median streaks of 
grayish brown, these mostly concealed, but on lower rump exposed 
and broader (more or less guttate or cuneate); anterior median 
upper tail-coverts white, narrowly streaked, medially, with dusky, 
the lateral and terminal coverts pale grayish brown spotted with paler 
and more buffy grayish brown and with dusky shaft-streaks; tail 
light grayish brown (grayish drab or light hair brown), barred (some- 
times indistinctly) with darker, the lateral rectrices narrowly tipped 
with dull white, the outermost one with ground color white, except 
distally, and distinctly barred even where bars on middle rectrices are 
indistinct; under parts dull white, the chin and upper throat, abdo- 
men, flanks, analregion, and median shorter under tail-coverts im- 
maculate, the lower throat, foreneck, chest, and upper breast very 
pale dull grayish buffy streaked with grayish brown, the streaks nar- 
rower and more sharply defined on upper breast, the sides streaked 
and irregularly spotted with the same (on a white ground); longer 
and lateral under tail-coverts narrowly streaked and spotted with 
grayish brown or dusky; axillars pure white, obliquely barred with 
grayish brown; under wing-coverts white, partly immaculate but 
partly spotted (irregularly) with dusky, the under primary coverts 
irregularly barred or spotted with pale gray; inner webs of primaries 
brownish gray with cuneate indentations of whitish, these extending 
halfway or more toward shaft, but sometimes this dull white form- 
ing a continuous but irregular broad edging; bill dusky, the mandible 
becoming pale brownish or ight horn color basally; iris dark brown; 
legs and feet dusky grayish (light grayish blue or bluish gray in life). 
Winter plumage.—‘ Similar to the summer plumage, but with the 
lower back perfectly white,* the black streaks being concealed, the 
under parts less distinctly streaked, and the flanks less distinctly 
barred.” ° 
Young.—‘May always be distinguished by the more mottled 
appearance of the upper surface, most of the feathers being spotted’ 
on both webs with whitish or pale rufescent buff; the lower back and 
rump are plentifully mottled with spots of dusky brown, and the 
innermost secondaries [tertials] very distinctly notched with rufescent 
buff; the streaks on the throat and breast and the bars on the flanks 
a Some specimens in summer plumage also show an immaculate (superficially) 
white lower back and rump.—R. R. 
» Sharpe, Cat. Birds Brit. Mus., xxiv, 358. 
