412 BULLETIN 50. UNITED STATES NATIONAL MUSEUM 



the two central pairs which are like the upper tail coverts but more heavily 

 and coarsely vermiculated with clove brown to dark dull sepia and without 

 the large sagittate subterminal chestnut marking; breast and upper ab- 

 domen gray vermiculated with dusky like the interscapulars but much 

 purer gray, not washed with buffy brown ; sides similar but the feathers 

 with subterminal broad sagittate bars of tawny; flanks similar but more 

 tinged with buff; in middle of upper abdomen a large patch of bright 

 auburn to pale chestnut, these feathers having white bases, middle of 

 lower abdomen and vent white ; thighs whitish tinged with grayish buff ; 

 under tail coverts pale buff to pale cinnamon-buff transversely narrowly 

 speckled with dull dark sepia ; bill greenish horn color ; tarsi and toes 

 gray tinged with yellowish flesh ; iris brown ; bare skin behind eye red. 



Adult male (summer plumage). — Same as the winter plumage but with 

 new feathers on the nape, interscapulars and throat, the new plumes on 

 the nape and interscapulars buffy gray with pale shaft lines. 



Adult male (rufescent phase). — Like the normal phase but with the 

 tawny of the head more ferruginous and extending over the breast which 

 is heavily vermiculated with deep bay ; the sides and flanks bay, the 

 dark brown abdominal spot much larger and deeper in color — dark bay. 



Adult female (winter plumage). — Like the corresponding male but 

 the tawny of the forehead, lores, cheeks, chin, and throat slightly paler 

 and pinker, less olive or tawny ; feathers of crown and occiput with darker 

 bases and with their subterminal pale shaft streaks terminally edged with 

 blackish, producing a more spotted appearance ; nape, interscapulars more 

 brownish, less grayish than in the male ; rest of upperparts more brownish, 

 less grayish than in the male and with more dark fuscous to fuscous- 

 black blotches showing (these basal areas of the feathers more extensive) 

 and with the subterminal dark sagittate band darker, deep chestnut to 

 bay ; breast averaging somewhat buffler than in male ; the middle of the 

 upper abdomen usually white with only a few broad chestnut tips on the 

 feathers, but also, in other specimens, a large chestnut patch almost as 

 extensive as in the male; wings as in male except that the median and 

 lesser upper coverts have buffy bars like the greater ones ; inner secondaries 

 and scapulars with less chestnut, the bases dark bister to fuscous with 

 widely spaced pale buffy bars. 



Adtdt female (summer plumage). — Like the winter plumage but with 

 the new feathers on the back and sides of the neck and the lower throat 

 with pale shaft streaks with tear-shaped spots margined with fuscous, 

 those on rest of upperparts brownish black narrowly tipped with buffy 

 and with widely spaced narrow pale buffy bands, those on breast, base 

 of throat and base of sides of neck broadly barred brown-black and 

 grayish white, and those on the sides of the breast and flanks broadly 

 barred and marked with buff and brownish black (ex Handbook British 

 Birds). 



