688 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



dusky, the feathers of loral region not distinctly (if at all) barred but 

 with conspicuously black shafts and bristly tips; facial rim or border 

 mostly black, especially from behind ears to sides of throat; chin dull 

 white; throat dull white, more or less tinged or suffused with pale cin- 

 namon-buff to light cinnamon, narrowly barred and mesially streaked 

 with black; a small area of immaculate dull white in center of fore- 

 neck; median line of abdomen, together with anal region, immaculate 

 buffy white; rest of under parts white (sometimes faintly tinged with 

 pale buff), broken by a rather dense narrow irregular barring of black 

 and broad mesial streaks of the same, these connected or confluent 

 with the bars, and on sides of breast enlarged into conspicuous spots, 

 which are often edged with light rusty or cinnamon; frequently, on 

 sides and flanks, pairs of the black bars enclose a space of pale brown, 

 or the bars themselves are more or less brownish; legs light cinnamon- 

 buff, fading into dull wliitish on lower and posterior portions of tarsi, 

 the thighs nearly immaculate but the tarsi heavily barred with deep to 

 dark brown, at least on upper portion; longer under tail-coveits wdth 

 distal portion barred or spotted with black and light brown; under 

 wing-coverts light buff, irregularly spotted and barred with brown 

 and dusky on outer portion, especially on under side of carpo-meta- 

 carpal region; under primary coverts plain dark grayish brown or 

 brownish gray vnih. basal portion, abruptly, pale buff; under surface 

 of outermost primaries dusky grayish brown or brownish gray, the 

 inner primaries and secondaries with broad transverse spots of the 

 same alternating with others of pale yellowish buff; bill pale grayish 

 green or pale dull greenish blue in life; iris bright lemon yellow, the 

 eyelids jet black; toes and basal portion of claws yellowish gray (in 

 life), the terminal portion of claws dusky. 



Young. — Remiges and rectrices as in adults; upper parts deep 

 grayish brown, indistinctly and rather broadly barred with dusky, 

 many of the feathers tipped with dull white; under parts dull white 

 broadly barred with grayish dusky; no streaks on upper or under 



parts. 



Rufescent phase. 



Adults (sexes alike). — General pattern of coloration much as in 

 the gray ])hase, but the gray or brown everywhere replaced by bright 

 cinnamon-rufous or chestnut-rufous (Kaiser brown), the upper parts 

 without vermiculations and the blackish streaks narrower and linear; 

 face plain light cinnamon-rufous, the superciliary and loral regions 

 whitish; under parts with pattern less intricate, the blackish or 

 dusky bars of the gray phase replaced by transverse spots of cinna- 

 mon-rufous. 



Young. — Similar to the young of the gray phase, but the grayish 

 or grayish brown markings more or less distinctly rufescent. 



