BIRDS OF NORTH AND MIDDLE AMKRICA. <)'25 



more or less distinct subraalar streak of blaclv, posteriorly eoiilluent 

 with black on side of neck; chin and upper throat white, posteriorly 

 shading- into buff on lower throat, this more or less graduall}' deepen- 

 ing posteriorly into deep tawny on under parts of body, deepest on 

 flanks, where the color inclines to chestnut-tawny or dark cinnamon- 

 rufous: under tail-ooverts and under parts of body more or less dis- 

 tinctly barred with black or dusk}-, and median portion of chest, 

 breast, and abdomen sometimes immaculate; maxilla black, with paler 

 (oiuia; mandible pale grayish (light bluisii g'ray in life!'): ii'is reddish 

 brown;" legs and feet blackish or dark horn color. 



Young. — Similar to adults, but black of head and chestnut of upper 

 parts slightly duller, and under parts indistinctly barred. 



Adult male. --IjQngih (skins); 130-142 (138); wing, 68.5-70 (69.2); 

 tail, 52.5-54.5 (53.1); exposed culmen, 20-20.5 (20.2); tarsus, 25-27 

 (25.6); middle toe, 16-17 (16.5).* 



Adult female.— l^Qugth. (skins), 122-139 (132); wing-, 63.5-72 (66.5); 

 tail, 48.5-56 (51.8); exposed culmen, 17-17.5 (17.2); tarsus, 24.5-25 

 (24.8); middle toe, 14.5-17 (15.5).'^ 



Isthmus of Panama, from line of Panama Railway (Aspinwall: Lion 

 Hill; Panama) north to Chiriqui and Veragua (Santiago). 



Thryothorus nigricapillus? (not of Sclater) Lau-rence, Ann. Lye. N. Y., vii, 1861, 



293 (Lion Hill, Panama R. R.). 

 Thryothorus castaneus Lawrence, Ann. Lye. Nat. Hist. X. Y., vii, June, 1861, 321 



(Lion Hill, Panama R. R. ; eoll. G. N. Lawrence). — Sclater and Salvin, 



Proc. Zool. Soc. Lond., 1864, 346 (Lion Hill).— Salvin, Proc. Zool. Soc. 



Lond., 1867, 134 (Santiago, Veragua). 

 IThryotliomx] castaneus B.\ird, Review Am. Birds, 1864, 123 (diagnosis). 

 Thryophilus cuKtaneus Baird, Review Am. Birds, Sept., 1864, 133 (Panama 



R. R.).— Salvi.n and Godmax, Biol. Centr.-Ani., Aves, i, 1880, 88, part 



(Santiago, Veragua; Lion Hill, Panama R. R.). — Sharpe, Cat. Birds Brit. 



Mus., vi, 1881, 216, excl. syn. part (Lion Hill). — Bangs, Proc. New Engl. 



Zool. Club, ii, 1900, 27 (Lion Hill). 

 [Thryophilus] castaneus Sclater and Salvin, Nom. Av. Neotr., 1873, 6, i)art 



(Panama). 

 T[hryo])hilvs] castaneus castaneus Hellmayr, Verb. k. k. znol.-hot. (iesellsch. 



Wien, 1901, 767, in text. 

 Troylodytes castaneus Gray, Hand-list, i, 1869, 190. no. 2r)96. 



THRYOPHILUS CASTANEUS COSTARICENSIS ^Sharpe). 

 COSTA RICAN BAY WREN. 



Similar to T. c. castaneus., but slightly larger and nuich more richly 

 colored, the back, etc., deeper chestnut, the under parts deep tawny - 

 chestnut, more abruptly contrasted with white of throat, and without 



« Heyde, manuscript. '' Four specimens. '"Three specimens. 



10384— VOL 3—03 4(» 



