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 gra3dsh brown spotted with paler 

 and more bufFy grayish brown and with dusky shaft-streaks; tail 

 light grayish browTi (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, anal region, 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 

 haKway 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 light horn color basally; iris dark brown; 

 legs and feet dusky grayish (light gra3ash 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 wiiitish or pale rufescent buff"; the lower back and 

 rump are plentifully mottled with spots of dusky brown, and the 

 innermost secondaries [tertials] very distinctly notclied 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. 



h Sharpe, Cat. Birds Brit. Mus., xxiv, 358. 



