RHYACOPHILUS. » Bye 
notched with white; lateral feathers white, barred with blackish, these 
bars becoming irregular on lateral feathers and reduced to a few freckles 
on outermost ones; feathers of crown and hind neck almost uniform ashy 
brown, slightly mottled with darker brown centers; lores dusky, sur- 
mounted by a distinct white eyebrow; sides of face white, slightly streaked 
with dark brown; ear-coverts uniform dark brown along their upper 
edge; cheeks and throat white; sides of neck, lower throat, fore neck, 
and chest ashy, varied with shaft-lines of brown; remainder of under 
surface pure white; sides of upper breast ashy brown; lateral under tail- 
coverts with blackish shaft-streaks and a few frecklings of black; under 
wing-coverts white, mottled with blackish bases; axillars white, with a 
few irregular bars and freckles; lower primary-coverts and quills below 
dusky brown, with whitish spots on the edges of the inner secondaries. 
‘Basal half of bill olive-brown, terminal half black; legs and feet pale 
greenish; claws dark horn-color; iris brown.’ (Oates.) Length, 216; 
culmen, 29; wing, 12; tail, 47; tarsus, 35. 
“Adult female.—Similar to the male. ‘Bill blackish, olive at the base 
of lower mandible; feet olive; iris very dark brown.’ (Butler.) Length, 
203; wing, 124; tail, 48; culmen, 28; tarsus, 38. 
“Adult male in summer plumage.—More variegated than in winter, 
the back being uniform dark brown, with large notches of white on both 
webs, and having very distinct white edges to scapulars and inner wing- 
coverts; long upper tail-coverts barred with dusky blackish and resem- 
bling the center tail-feathers; head and neck streaked with white; sides 
of face, lower throat, and fore neck very distinctly and broadly streaked 
with blackish brown centers to the feathers; sides of body and under 
tail-coverts mottled with cross-bars of blackish brown; the axillars 
narrowly barred with blackish brown. ‘Bill blackish olive, below at base 
lighter brownish olive; feet light grayish olive; iris dark brown.’ 
(Stejneger.) Length, 178; culmen, 33; wing, 124; tail, 47; tarsus, 35. 
“Young after first molt——Differs from the adults in being closely 
spotted on the upper surface, but the spots more or less rufeseent ; lower 
throat and chest ashy as in the winter plumage of the adults, but the 
dusky brown stripes very distinct and invading sides of body; axillars 
pure white, or with the merest trace of brown frecklings. ‘Bill dusky 
brown, inclining to greenish olive toward base; feet greenish olive, iris 
blackish brown.’ (Butler.) 
“In the breeding season the white spots on the upper surface become 
much worn and abraded, so that the general appearance of the back is 
very uniform; the mottling on the fore neck and chest becomes very 
distinct by reason of the abrasion of the white margins of the feathers, 
and the axillars are completely barred across with brown.” (Sharpe.) 
