BIRDS OF NORTH AND MIDDLE AMERICA. 515 
gion, and entire under parts, including axillars and under wing- 
coverts, immaculate white, the posterior under parts (especially 
under tail-coverts) very faintly tinged with pale gray; crown, occi- 
put, nape, upper portion of auricular region, and broad stripe on 
lores (from lower portion of lateral base of maxilla to anterior angle 
of eye) uniform deep black, this extending narrowly above eye; rest 
of upper parts, including hindneck, rump, upper tail-coverts, and 
tail plain fuscous-black, the remiges with a somewhat grayish cast, 
the feathers of hindneck white beneath surface; anterior margin of 
lesser wing-covert area, abruptly, white; lateral pair of rectrices 
white, with distal portion of inner web, more or less extensively, 
dusky; next pair of rectrices with inner web blackish distally, passing 
into pale gray or grayish white basally; inner webs of primaries 
neutral gray with a well-defined stripe of dusky next to shaft, the 
latter yellowish white; bill, black; iris, dark brown; -legs and feet, 
dusky or blackish. 
Adults in winter—Similar to summer adults but, according to 
Saunders? ‘‘with white flecks on the lores and crown.” 
Immature.— Brownish black above, darker on the upper wing- 
coverts; outer tail-feathers nearly as sooty black as the rest of the 
rectrices, except towards the tips; tarsi and toes reddish brown.’’* 
Young.—Upper parts deep sooty brown (clove brown to blackish 
brown or fuscous-black), the scapulars, interscapulars, tertials, 
smaller wing-coverts, feathers of rump, and upper tail-coverts tipped 
with white or brownish white, the bars thus formed broadest on pos- 
terior scapulars, narrowest on interscapulars, rump, and upper tail- 
coverts; under parts lighter grayish brown (clove brown to dusky 
drab), passing into much lighter grayish brown or brownish gray on 
anal region and under tail-coverts, where the feathers are more or 
less distinctly tipped with a darker or more brownish hue, the abdo- 
men more or less intermixed with white; outermost (and other) 
rectrices wholly dusky; remiges as in’adults, but darker stripe next 
to shaft on inner webs less distinct; bill brownish black or dusky 
brown. 
Downy young.—Upper parts varying from dark sooty (fuscous- 
black), narrowly streaked with pale grayish buffy or dul buffy 
whitish, to pale buffy grayish narrowly and- indistinctly, but thickly 
streaked with dusky; suborbital and malar regions and sides of neck 
and chest (usually chin and throat also), light brownish gray minutely 
flecked with paler; rest of under parts immaculate dull white; bill 
brownish; legs and feet brownish or dusky. 
Adult ee —Wing, 272-300 (286.6); tail, 180-162 (148. 9); sunbed 
culmen, 40-47 (44.1); tarsus, 22-25 (23.1); middle toe, 19-22 (20.9).® 
@ Cat. Birds Brit. Mus., xxv, 1896, 109. 
b Seven specimens from Arcas Keys, Yucatan. 
