674 



BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



from base, 17-19.5 (18.3); tarsus, 21-21 (22.9); middle toe, 16-19 

 (17.2).^' 



Young. — Similar to adults, but texture of plumage much more lax, 

 blackish bars on wings and tail more irregular and less sharply defined, 

 and back and scapulars always (?) narrowly barred with dusk}^. 



Isthmus of Panama (Chepo; Lion Hill; Panama; Nata-Cocle), east- 

 ern Costa Rica (Talamanca; Valza; Angostura; Pacuare; Matina), 

 eastern Nicaragua (Los Sabalos; Santo Domingo, Chontales*). and 

 southeastern Honduras (Segovia River). 



Cyphorhinus cantans (not Tiirdus cantans Gmelin) Lawrence, Ann. Lye. N. Y., 

 vii, 1861, 293 (Lion Hill, Panama R. R.). 



Cyphorinus laurencil Lawrence, Ann. Lye. Nat. Hist. N. Y., viii, 1863, 5 (Lion 

 Hill Station, Panama R. R. ; coll. G. N. Lawrence; ex Sclater, manuscript) . — 

 Baird, Review Am. Birds, 1864, 113 (Lion Hill). — Sclater and Salvin, 

 Proe. Zool. Soc. Lond., 1864, 345 (Lion Hill) ; Exotic Orn., pt. iii, 1867, 41, pi. 

 21 (Chepo, Isthmus Panama) ; Nom. Av. Neotr. 1873, 6. — Salvin and Godman, 

 Biol. Centr.-Am., Aves, i, 1880, 75 (Angostura and Valza, Costa Rica; Lion 

 Hill and Chepo, Panama R. R.).— Sharpe, Cat. Birds Brit. Mus., vi, 1881, 

 294 (Panama; Chepo).— Nutting, Proc. U. S. Nat. Mus., vi, 1884, 398 (Los 

 Sabalos, Nicaragua; ha])its). 



[Cyphorinus'] Imvrencii Sclater and Salvin, Nom. A v. Neotr., 1873, 6. 



CypJioriims lawrencei Lawrence, Ann. Lye. N. Y., ix, 1868, 92 (Angostura, Costa 

 Rica). — Zeledon, Cat. Aves de Costa Rica, 1882, 3; Proc. U. S. Nat. Mus., 

 viii, 1885, 105; Anal. Mus. Nac, Costa Rica, i, 1887, 105 (Pacuare and 

 Matina, Costa Rica). 



\_Oyphorliinus] lawrencei Gray, Hand-list, i, 1869, 193, no. 2660. 



Cyplwrkmus lavrencii Ridgway, Proc. U. S. Nat. Mus., x, 1888, 585 (Segovia 

 River, Honduras). — Bangs, Proc. New Engl. Zool. Club, ii, 1900, 27 (Loma 

 del Leon, Panama R. R. ). 



(?) Cyphorinus richardsoni Salvin, Bull. Brit. Orn. Club, no. vi. Mar. 1, 1893, p. 

 xxxii (Santo Domingo, Chontales, Nicaragua; coll. Salvin and Godman); 

 Ibis, sixth ser., v, Apr., 1893, 263 (do.).'> 



« Ten specimens. 



Specimens from difierent localities compare in average measurements as follows: 



'' In view of the fact that specimens from Los Sabalos on the San Juan River and 

 from the Segovia River, Honduras, are not distinguishable from Panama specimens, 

 that some specimens from the Isthmus of Panama have the supraloral region chest- 

 nut, and that the range of individual variation in shades of color is considerable 

 among specimens from any one locality, I feel reasonably sure that the supposed new 

 form from Chontales, named Cyphorhinus richardsoni by Salvin and Godman, was 

 based on an individual or seasonal variation of the present bird. 



