352 



BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



scapulars, and hindneck; piloum with a distinct median stripe of pale 

 grayish bufly stri'aks, the black lateral portions narrowly and indis- 

 tinctly streaked with light olive-brownish; lesser wing-coverts broadly 

 margined with })rownish gray, the margins or edges of other wing- 

 feathers more brown or buffy; rump grayish olive, broadl}" but not 

 distinctly, streaked with dusky; terminal portion of secondaries and 

 rectrices barred, more or less, with brownish gray; upper tail-coverts 

 brownish gray narrowly barred with dusky; a broad superciliary stripe 

 of dull buffy; a blackish postocular streak; auricular region and sides 

 of neck light Inifl'y grayish brown, the latter streaked with blackish; 

 chin, throat, chest, breast, and upper part of abdomen plain light wood 

 brown or dull brownish ])uff', the ])reast and abdomen tinged with pink- 

 ish red; lower abdomen, flanks, and under tail-coverts light buffy olive, 

 broadl}^ streaked with dusky, the last also narrowly barred with the 

 same; under wing-coverts uniform sooty black; edge of wing, particu- 

 larly the carpal region, pinkish red. 



Adult f<nnale after hreedhig Kecmni. — Similar to the preceding, but 

 paler markings of upper parts broader (the blackish streaks corre- 

 spondingly narrower), and the color more brown; general color of 

 under parts rather deeper, with dusky streaks on flanks, etc., narrower; 

 under wing-coverts dusky grayish. 



Young. — Somewhat like post-nuptial adult female, but chest and 

 sides streaked with dusky. ^ 



Adult wirt/d.— Length (skins), 137.2-194.8 (170.4); wing, 88.9-99.1 

 (95); tail, 48.8-67.8 (55.4); culmen, from base, 19.8-22.9 (20.3); depth 

 of bill at base, 10-12.7 (11.9); tarsus, 27.9-32.8 (30.5); middle toe, 

 20.6-23.5 (22.1).- 



AduItfeiiude.'-l^Qmyih (skins), 165.1-170.2 (167.4); Aving, 83.8-89.9 

 (86.1); tail, 53.3-61 (57.2); culmen, from base, 17.8-19.3 (18.5); depth 

 of bill at base (one specimen), 10.4; tarsus, 28.2-30.5 (29); middle toe, 

 19.6-22.4 (20.6).' 



^The single 3'oung bird seen by me has partly assumed the adult jtlumage. 



^ Eighteen specimens. 



•'' Five specimens. 



Adult males from different localities average as follows: 



I 



Locality. 



Two adult males from Chiriqui and Panama 



One adult male from Bogota, Colombia 



Two adult males from eastern I'uru and Rio 



Madeira 



Five adult males from lower Amazon 



Five adult males from Cayenne and British 



Quiana 



Three adult males from Trinidad 



Wing. 



91.4 

 y3.5 



94.2 



98.8 



95 

 91.9 



Tail. 



56.6 



58.7 



58. 7 

 C3.8 



60.2 

 54.4 



Culmen, 

 from 

 base. 



21.6 

 22. 1 



21.6 

 20.8 



Depth 

 of bill 

 at base. 



11.9 

 12.2 



11.2 

 12.2 



11.9 

 11.2 



While considerable differences in measurements are thus indicated, 1 am unable 

 to detect any local variation in plumage, at least among adult males. 



