BIRB8 OF NOETH AND MIDDLE AMERICA. 597 



6. Coloration paler, more tawny; slightly smaller (adult male averaging, wing 51.7, 

 exposed culmen 14, tarsus 19.2; adult female, wing 50, exposed culmen 14.2, 

 tarsus 19.2) . (Unalaska Island, Aleutian chain, and St. George Island, Pribi- 

 lof group, Alaska. ) Olbiorchilus alasoensis ( p. 602 ) 



bb. Coloration darker, more sooty; slightly larger (adult male averaging, wing 54, 

 exposed culmen 15, tarsus 20; adult female, wing 51, exposed culmen 15, 

 tarsus 20). (Westernmost Aleutian Islands.) . .Olbiorchilus meligeruB (p. 604) 



OLBIORCHILUS HIEMALIS HIEMALIS (Vieillot). 

 WINTER WREN, 



Adults {sexes alike). — Above rufescent brown (between mummy 

 brown and prouts brown), more strongly rufescent posteriorly, the 

 back, scapulars, and rump more or less distinctly barred with dusky, 

 often with more or less distinct whitish bars immediately succeeding 

 the dusky ones; feathers of rump with concealed roundish spots of 

 white, their basal portion dark slate color; tail light chestnut-brown 

 or rufescent mars brown, narrowly (sometimes indistinctlj') barred 

 with dusky; wings similar in color to back, etc. (slightly less reddish 

 than tail), more or less distinctly barred with dusky, the outermost 

 primaries with dusky bars mucb broader and interspaces buffy or 

 whitish; tip of middle coverts usually with a small mesial streak or 

 spot of whitish ; a narrow superciliary stripe of brownish buffy; a more 

 or less distinct narrow postocular stripe of brown; suborbital and 

 auricular regions brownish buffy, narrowly streaked (more or less 

 distinctly) with brown; malar region, chin, throat, and chest (some- 

 times median portion of breast, more rarely abdomen also) light wood 

 brown or pale cinnamon, the feathers usually obsoletely paler mesially, 

 the lower throat and chest sometimes speckled with dusky; rest of 

 under parts more or less densely speckled or vermiculated with dusky 

 on a pale wood brown or cinnamon ground-color, these markings heavier 

 and more regularly transverse, on flanks; under tail -coverts clear rusty 

 brown, barred with black and with a V-shaped subterminal mark of 

 white; axillars and under wing-coverts pale grayish brown or dull 

 grayish white, the former faintly barred terminally with darker, the 

 latter more or less speckled with dusky; maxilla dusky brown or 

 blackish, with paler tomia; mandible pale brownish; iris brown; legs 

 and feet light brown (in dried skins). 



Young. — Essentially like adults, but brown of back, scapulars, rump, 

 and upper tail-coverts without bars, superciliary and postocular stripes 

 indistinct, and under parts darker, with feathers more or less distinctly 

 margined with dusky. 



Adult male.— hength (skins), 87-92 (90); wing, 46^50 (47.6); tail, 

 28-32 (30.3); exposed culmen, 11-12 (11.2); tarsus, 18-19.5 (18.6); 

 middle toe, 12-13 (12.8).« 



aTen specimens. 



