BIRDS OF NORTH AND MIDDLE AMERICA. 605 



[Anorthuru troglodytes var. hyemalis] c. alascengis Coues, Birds Northwest, 1874, 

 33, part (in synonymy). 



Alnorthura] tlroglodytes] alascenm Coues, Key N. Am. Birds, 2d ed., 1884, 279, 

 part. 



Anorthura meligera Oberholsee, Auk, xvii, Jan., 1900, 25 (Attn I., western 

 Aleutians; coll. U. S. Nat. Mus.). — American Ornithologists' Union Com- 

 mittee, Auk, xviii, 1901, 307 (check list no. 723.1). 



Olbwrchilus meligerus Obbrholser, Auk, xix, Apr., 1902, 178. — American Orni- 

 thologists' Union Committee, Auk, xix, 1902, 330. 



Genus THRYORCHILUS Oberholser. 



Thryorchilus<i ObsrkoTuSBR, Proc. U. S. Nat. Mus., xxvii, no. 1354, Jan. 23, 1904, 198. 

 (Type, Troglodytes brovmi Bangs. ) 



Small, very short-tailed, long-legged Troglodytidse, resembling 

 Henicorhina and Mannorchilus, but with only 10 instead of 12 rectrices, 

 and with the nostril narrowly ovate, longitudinal, and distinctly oper- 

 culate, as in Troglodytes. 



Bill shorter than head, its depth at frontal antise a little less than 

 one-fourth the exposed culmen, the latter decidedly shorter than 

 middle toe without claw; culmen straight for basal half or more, then 

 gradually decurved to tip;-gonys straight, its base forming a slight 

 but distinct angle; maxillary tomium faintly concave, without trace 

 of sub terminal notch; nostril narrowly ovate or pyriform (its narrow 

 end antex'iorly), longitudinal, overhung by a conspicuous excurrent 

 operculum. Rictal bristles obsolete. Wing mode'rate in length, much 

 rounded; seventh, sixth, and fifth, or sixth, fifth, and fourth primaries 

 longest, the ninth much shorter than secondaries, the tenth (outer- 

 most) decidedly more than half as long as ninth. Tail about two- 

 thirds as long as wing, decidedly rounded, apparently consisting of 

 only ten rectrices. Legs and feet stout, the tarsus nearly half as long 

 as wing; middle toe, with claw, decidedly shorter than tarsus; outer 

 toe longer than inner, reaching (without claw) to middle of sub- 

 terminal phalanx of middle toe, the inner (without claw) reaching 

 considerably beyond penultimate joint of middle toe; hallux as long 

 as inner toe, or slightly longer, much stouter. 



Coloration. — Above_ tawny -brown, the remiges and rectrices barred 

 with duskj"^, the primaries conspicuously edged with white; super- 

 ciliary stripe and under parts grayish white or pale gray, the flanks 

 and under tail-coverts light tawny-brown; sides of neck streaked with 

 brown and whitish. 



Range. — High mountains of Chiriqui (Volcan deChiriqui, 10,000 to 

 10,400 feet). (Monotypic.) 



a"@pvoy, juncus; Apxi^o?, regulus." 



