628 BULLETIN 50, UNITED STATES NATIONAL MUSEUM^ 



the streaks sometimes (in younger specimens ?) restricted to forehead 

 and sides of crown; lower hindneck with large, mostly triangular or 

 broadly hastate, mostly concealed, spots of white; exterior scapiilars 

 with outer webs mostly white, margined terminally with brown; 

 distal larger wing-coverts with a few spots of white; outermost feather 

 of alula more or less broadly edged with white; outer webs of outer 

 primaries spotted along edge with white; tail crossed by two or three 

 interrupted narrow bands of white and margiaed at tip with the same, 

 the transverse spots forming the bands not touching shaft on. either 

 web; supercUiary, orbital, and loral regions and chin dull white, the 

 eye margiaed above and in front with dusky, this in front of eye 

 sometimes spreading over greater portion of lores; auricular region 

 dull buffy white to cinnamon-buff," broadly streaked with brown; 

 across middle of throat and thence, on each side, to the postauricular 

 ruff, a band of brown or chestnut-brown spots or streaks, this some- 

 times advanciag anteriorly, ia middle portion, forming more or less 

 of a patch on upper throat; postauricular ruff streaked with brown 

 and white, the former predominating; rest of under parts white, more 

 or less tinged or suffused with pale buff, broadly striped or longitu- 

 dinally spotted with Hght mars brown or chestnut-brown; under 

 tail-coverts immaculate white or, more rarely, with small and indis- 

 tinct terminal spots or mesial streaks of pale brown; legs pale buff 

 to cronamon-buff, the toes paler (dull white or buffy ,white) ; under 

 wing-coverts buffy white to light cinnamon-buff, becoming white 

 along edge of wing, sparsely spotted with light brown or chestnut- 

 brown near edge of wing; under primary coverts white, broadly and 

 abruptly tipped with grayish brown; under surface of remiges grayish 

 brown, the inner webs of secondaries and proximal primaries with 

 large spots of white, the outer primaries sometimes with, a few small, 

 narrow, obhque white spots, sometimes immaculate; biU black; iris 

 lemon yellow; naked portion of toes pale dull yellowish (in life). 



Young. — Kemiges and rectrices (only) as in adults; superciliary 

 region and anterior portion of forehead white, in strong contrast with 

 the uniformly blackish brown or (more rarely) lighter brown of 

 auricular region; rest of pUeum, together with upper parts (except 

 remiges, rectrices, etc.), plain deep brown (vandyke brown to nearly 

 chestnut-brown) ; chin and sides of throat (subauricular region) dull 

 white; throat, chest, and breast plain brown (similar to but lighter 

 than color of upper parts) ; rest of tmder parts plain tawny-buff or 

 cinnamon-buff. 



« The cinnamon-buff color strongly developed, however, among specimena exam- 

 ined, only in the type of Nyctala acadica scotssa (Osgood), from the Queen Charlotte 

 Islands, 



