BIKDS OF NORTH AND MIDDLE AMERICA. 



145 



tail, 49-55 (51.6); exposed culmen, 13-15 (14); tarsus, lT-19 (18.4); 

 middle toe, 10-11 (10.8)." 



From northern Mexico, in States of Tamaulipas (Victoria; Alta 

 Mira), Nuevo Leon (Monterey), Sinaloa (Mazatlan; Rosario), etc., 

 southward over rest of Mexico (including Yucatan) and whole of Cen- 

 tral America (both coasts) to Isthmus of Panama, and southward to 

 Ecuador (Rio Napo; Quito), Peru (Guayango), and Bolivia. Acci- 

 dental in southern Texas (Fort Brown, one specimen, August 23, 

 1877), southern California (Riverside, Los Angeles County, one speci- 

 men September 29, 1887), and Canada (Godbout, Quebec, one speci- 

 men. May 13, 1883). 



Vireosylvia flavoviridis Cassin, Proc. Ac. Nat. Sci. Philad., v, Feb., 1851, 152, pi. 11 

 (Panama; coll. Ac. Nat. Sci. Philad.) .—Sclater, Proc. Zool. Soc. Lond., 1856, 

 298 (Cordova, Vera Cruz); 1859, 375 (Playa Vicente, Oaxaca); Cat. Am. 

 Birds, 1862, 44 (Guatemala).— La whence, Ann. Lye. N. Y., vii, 1861, 323 

 (Panama E. R.); Mem. Bost. Soc. N. H., ii, 1874, 272 (Mazatlan and Rosa- 

 rio, Sinaloa); Bull. U. S. Nat. Mus., no. 4, 1876, 17 (Tapana and Santa 

 Efigenia, Oaxaca). — Baikd, Review Am. Birds, 1866, 336 (Monterey, Nuevo 

 Leon; Mazatlan; Rosario; near Colima; San Jos6, Costa Rica; Isthmus of 

 Panama). — Salvin, Proc. Zool. Soc. Lond., 1870, 184 (Mina de Chorcha, 

 Bugaba, and Chitra, Veragua). — Scmichrast, Mem. Bost. Soc. N. H., i, 

 1869, 547 (temp, region Vera Cruz, up to 4,866 ft. on Orizaba). — Frantzius, 

 Journ. fiir Orn., 1869, 295 (Costa Rica). — Baird, Brewer, and Ridoway, 

 Hist. N. Am. Birds, i, 1874, 366.— (?) Taczanowski, Proc. Zool. Soc. Lond., 

 1874, 509 (Monterico, centr. Peru). — Merrill, Proc. U. S. Nat. Mus., i, 

 1878, 125 (Fort Brown, Texas, 1 spec, Aug. 23).— Ridgway, Proc. U. S. Nat. 

 Mus., i, 1878, 125 (synonymy).— Boucard, Proc. Zool. Soc. Lond., 1878, 53 

 (San Jos^, Costa Rica). — Nutting, Proc. U. S. Nat. Mus., v, 1882, 391 (La 

 Palma de Nicoya, w. Costa Rica). 



« Eleven specimens. 



Average measurements according to geographic area are as follows: 



Specimens from eastern Mexico (Tamaulipas to Campeche) are appreciably 

 brighter olive-green above and have the sides and flanks brighter olive-yellow than 

 those from western Mexico, Costa Rica, Veragua, and Panama, and province of 

 Santa Marta, Colombia. 



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