RENDAHL, BIRDS FROM THE PEARL ISLANDS. 47 



Thayer and Bångs, who had seventy-three specimens 

 of this bird from the Pearl Islands, express the opinion that 

 there is no difference to examples from the Islands and those 

 from the Isthmus of Panama, but add, there is a consider- 

 able amount of individual variation among the skins collec- 

 ted in the islands. In fact, they say, it is difficult to pick 

 out two skins quite alike. 



It is said to be common in mangrove swamps bordering 

 the islands, much more so than in the mangroves near the 

 city of Panama. 



*78. Dendroica coronata (Linné). 



Dendroica coronata Thayer and Bångs, Bull. Mus. Comp. Zoöl. XLVI. 1905. 

 156 (San Miguel, February 23). 



The Myrtle Warbler was not collected by Dr. Bovallius. 

 Winter range: From Kansas, Ohio Valley, New Jer- 

 sey, and central Oregon south to Panama. 



*79. Dendroica fusca (Muller). 



Dendroica blackburniae Thayer and Bångs, Bull. Mus. Comp. Zoöl. XLVI. 

 1905. 156 (Saboga, April 4 and 11). 



Bovallius' Collection: 3", Viveros, April 10. 

 Winter range: Colombia to central Peru . 



*80. Dendroica cerulea (Wilson). 



Dendroica rara Thayer and Bångs, Bull. Mus. Comp. Zoöl. XLVI. 1905. 156 

 (San Miguel, March 15). 



This species was not collected by Dr. Bovallius. 

 Winter range: Panama to Peru. 



*81. Dendroica castanea (Wilson). 



Dendroica castanea Thayer and Bångs, Bull. Mus. Comp. Zoöl. XLVI. 1905. 

 (San Miguel, March 6; Saboga, April 3). 



The Bay-breasted Warbler was not collected by Dr. 

 Bovallius. 



Winter range: Panama and Colombia. Jewel (1. c. 

 page 428) remarks, that the bird is in November and De- 



