Carriker : List of the Birds of Costa Rica. 801 



This is one of the most abundant of the migrant warblers to be found 

 in Costa Rica, ranging over the whole country from sea-level to not less 

 than 6,000 or 7,000 feet. It arrives about the middle of August, but 

 does not remain as late in the spring as some other species. 



597. Wilsonia canadensis (Linnaeus). 



[Muscicapa] canadensis Linnaeus, Syst. Nat., ed. 12, I, 1766, 327 (based on 

 Gobe-mouche cendre de Canada, Muscicapa canadensis cinerea, Brisson, Orn., 

 II, 406, pi. 39. fig. 4). 



Myiodioctes canadensis Lawrence, Ann. Lye. N. Y., IX, 1868, 95 (Dota [F. 

 Carmiol]). — Frantzius, Jour, fiir Orn., 1869, 294 (Costa Rica). — Salvin 

 and Godman, Biol. Centr.-Am., Aves, I, 1881, 166 (Costa Rican references). 



— Sharpe, Cat. Birds Brit. Mus., X, 1885, 432 (Irazu district [Rogers]). — 

 Underwood, Ibis, 1896, 434 (Miravalles). 



Euthlypis canadensis Cabanis, Jour, fiir Orn., i860, 326 (highlands of Costa 



Rica, Sept. [Hoffmann]). 

 Sylvania canadensis Zeledon, An. Mus. Nac. de C. R., I, 1887, 107 (Jimenez). 



— Cherrie, Auk, VII, 1890, 337 (San Jose, Sept. 29; abundant during 

 October;. 



Wilsonia canadensis Ridgway, Birds N. and Mid. Amer., II, 1902, 716 (eastern 

 North America, south in winter through eastern Mexico and Central America 

 to Ecuador). 



Bangs Collection: San Jose, Oct. 20 (Underwood). 



Acad. Nat. Sci. Philadelphia: Miravalles, Oct. 2 (Underwood). 



Fleming Collection: Carrillo, Oct. 12 (Underwood). 



Carnegie Museum: Rio Sicsola, Sept. 21-26, and Oct. 7 (Carriker). Four 



skins. 



This warbler is fairly abundant in the eastern part of Costa Rica during 

 late September and October, but after that seems to pass on further south, 

 and few are seen later. On the return in spring it evidently does not 

 stop. It is found on the Pacific slope, and in the plateau region also, 

 but in smaller numbers. 



598. Wilsonia pusilla pusilla (Wilson). 



Muscicapa pusilla Wilson, Am. Orn., Ill, 1811, 103, pi. 26, fig. 4. 

 Wilsonia pusilla Bonaparte, Geog. and Comp. List, 1838, 23. 

 Wilsonia pusilla pusilla Ridgway, Birds N. and Mid. Amer., II, 1902, 710 (east- 

 ern North America, south in winter to Santo Domingo and eastern Mexico). 



— Bangs, Proc. Biol. Soc. Wash., XXII, 1909, 36 (Tenorio, Feb. 1, 1908, 9 ; 

 Cerro de Santa Maria, Jan. 4 and 8, 1908, two cf's [Underwood]). 



The above record lately published by Mr. Bangs furnishes the first 

 authentic evidence we have of the presence of this bird in Costa Rica. 



