192 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



maries dusky grayish brown, the latter abruptly white basally; shafts 

 of primaries white, except terminally; primary coverts and distal 

 primaries darker grayish brown or fuscous, the proximal coverts 

 tipped with white; tertials dusky grayish brown to fuscous-black, 

 irregularly edged with buffy or cinnamomeous, sometimes indistinctly 

 spotted with grayish brown; lower back and rump plain dusky grayish 

 brown or fuscous; anterior upper tail coverts, abruptly, white (usually 

 immaculate), the posterior (longer) ones sooty black; tail sooty black 

 or fuscous-black, margined terminally with white, abruptly white 

 basally (except on middle rectrices), the white increasing in extent 

 to the outermost rectrix, on which it occupies more than the basal half ; 

 under parts of body light russet or mikado brown, irregularly barred 

 with dusky (the bars narrower and less distinct on median portions, 

 broader and more nearly black on sides and flanks), some of the 

 feathers, usually, narrowly tipped with white; anal region and under 

 tail-coverts mixed white and light russet, barred with dusky, the bars 

 broader on longer under tail-coverts; axillars uniform dark sooty 

 brown or fuscous, the under wing-coverts similar but those along edge 

 of wing margined with white and the outer webs of greater coverts 

 white; bill dull yellowish (in life), darker on culmen, blackish termi- 

 nally; iris dark brown; legs and feet dusky (light bluish gray in life). 



Adults in winter. — Back and scapulars plain brownish gray or 

 grayish brown, like wing-coverts; head and neck paler brownish gray, 

 sometimes suffused with buffy whitish; under parts dull whitish or 

 pale grayish buffy, shaded with brownish gray anteriorly; otherwise 

 as in summer plumage. 



Young. — Back and scapulars dull brownish gray or grayish brown, 

 the feathers margined terminally with buffy and with a submarginal 

 crescent of dusky; under parts pale dull grayish buffy, the chest more 

 grayish, the abdomen more whitish; otherwise much like winter 

 adults. 



Adult male.— Wmg, 196-210.5 (203.5); tail, 72-76 (74); exposed 

 culmen, 69-92 (76.7) ; tarsus, 54-62 (57.5); middle toe, 31-35 (32.5) .« 



Adult female.— Wmg, 203-222 (212.9); tail, 73.5-82 (77.9); ex- 

 posed culmen, 67-88 (79.5); tarsus, 55-59.5 (58.1); middle toe, 



31-32 (31.7).« 



* ^ 



o Four specimens. 



Some of the specixaens measured doubtless have the sex incorrectly determined. 

 Fourteen males and four females measured (before skinning) by Mr. G. S. Agersborg 

 (see Bull. Nutt. Orn. Club, v, 1880, 60) show a decided sexual difference in size, the 

 measurements (converted from inches and hundredths to millimeters) being as follows: — 



MaZes.— Length, 355.6-381 (average, 371.8); extent of wings, 622.3-660.4 (639.3); 

 tail, 76.2-88.9 (82); bill [exposed culmen?], 71.1-81.3 (74.9); tarsus, 55.9-59.7 (57.1); 

 weight, 7^-8 ounces. 



Females. — Length, 393.7^19.1 (407.9); extent of wings (one specimen only), 673.1; 

 tail, 81.3-88.9 (85.3); bill [exposed culmen?], 86.4-90.2 (87.4); tarsus, 62.2-64.8 (63.2); 

 weight, 9-9 i ounces. 



