BIRDS OF NORTH AND MIDDM AMBBIOA, 685 



TlhryopMl-us'] rufalbus castanonoius Hellmayr, Verh. k. k. zool.-bot. GeselLsch. 



Wien, 1901, 769, in text. 

 Thryothorus rufalbus castanonoius Eidqway, Proc. U. S. Kat. Mus., x, sig. 32, 



Aug. 6,a 1888, 508 (Angostura, Costa Rica; coll. D". S. Nat. Mus.). 



THRYOPHILUS SINALOA SINALOA Baird. 

 SINALOA WREN. 



Adults in fsprlng and nunnier. — PileuDi, hindneck, back, and scap- 

 ulars, plain grayish tawny-brown (between raw-umber and broccoli 

 brown but much nearer the former); rump and upper tail-coverts 

 similar but more rufescent, inclining more or less toward russet; tail 

 russet, rather broadly barred with dusky; wing-coverts similar in 

 color to back, the greater with very indistinct bars of darker brown, 

 some of the middle coverts usually with a small median streak or gut- 

 tate spot of paler (dull whitish or brownish white) margined, in part, 

 with dusky; remiges cinnamon-brown, narrowly barred with dusky, 

 the outermost primaries with interspaces much paler (pale wood 

 brownish) ; a rather narrow but sharply defined and conspicuous super- 

 ciliary stripe of white or buffy white; a narrow postocular stripe of 

 brown, occupying upper portion of auricular region; sides of neck 

 broadly streaked with white and black, the black streaks narrower 

 than the white and edged with brown ; suborbital, malar, and auricular 

 regions (except upper portion of latter) white, the last narrowly 

 streaked with dusky, the first and second usually with very narrow 

 dusky margins to the feathers; under parts dull white, the sides of 

 chest more or less strongly shaded with pale brownish gray, this pass- 

 ing into light brown (similar in hue to color of back but paler) on 

 sides and flanks; under tail-coverts white, broadly barred with black, 

 the black bars narrowly margined with pale rusty bi'own; maxilla 

 horn color with paler tomia; mandible pale horn color (in dried 

 skins); iris brown;* legs and feet pale horn color (in dried skins). 



Adults in autumn and winter. — Similar to the spring and summer 

 plumage, but more brightly colored, the general color of upper parts 

 more russet or cinnamon-brown, the flanks brighter cinnamon-brown 

 or tawny-olive. 



Young. — Essentially like adults in coloration, but under tail-coverts 

 pale cinnamon, very indistinctly barred with darker, flanks paler and 

 more decidedly cinnamon, whitish superciliary and brown postocular 

 stripes less distinct, sides of neck streaked with brown and white (no 

 black streaks), and white of under parts more or less obscured by 

 indistinct tips or terminal margins of very pale bufl:y brown. 



. ^Although intended to be the first publication of the new form, the description 

 here cited was not published until nearly six months after the briefer or more gen- 

 eral one, without synonymy, in Proc. Boat. Soc. Nat. Hist., cited previously. 

 6 Grayson, manuscript. 



