BIRDS OF NORTH AND MIDDLE AMERICA. 625 



more or less distinct submalar streak of black, posteriorly confluent 

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

 shading into buff on lower throat, this more or less gradually 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-coverts and under parts of body more or less dis- 

 tinctly barred with black or dusky, and median portion of chest, 

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

 tomia; mandible pale grayish (light bluish gray in life?); iris 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 ma^c— Length (skins); 130-142 (138); wing, 68.5-70 (69.2); 

 tail, 62.5-54.5 (53.1); exposed culmen, 20-20.5 (20.2); tarsus, 26-27 

 (26.6); middle toe, 16-17 (16.5). » 



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

 tail, 48.5-66 (51.8); exposed culmen, 17-17.5 (17.2); tarsus, 24.5-25 

 (24.8); middle toe, 14.5-17 (16.5).'^ 



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

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



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



293 (Lion Hill, Panama B. E.)'. 

 Thryothorus castarieus Lawrence, Ann. Lye. Nat. Hist. N. Y., vii, June, 1861, 321 



(Lion Hill, Panama R. R.; coll. G. N. Lawrence). — Sclatek and Salvin, 



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



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

 [Thryothorus^ castaneus Baird, Review Am. Birds, 1864, 123 (diagnosis). 

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



R. R.). — Salvin and Godman, Biol. Centr.-Am., 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, part 



(Panama). 

 T[hryophilus] castaneus castaneus Hellmayr, Verh. k. k. zod.-bot. Gesellsch. 



Wien, 1901, 767, in text. 

 Troglodytes castaneus Gray, Hand-list, i, 1869, 190, no. 2596. 



THRYOPHILUS CASTANEUS COSTARXCENSIS (Sharpe). 

 COSTA RICAN BAT WREN. 



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

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

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



<J Heyde, manuscript. b Four specimens. " Three specimens. 



10384— VOL 3—03 40 



