16 NORTH AMERTCAN WARBLERS. 



Cape May warbler {Dendroica tigrina). West Indies. Key West — rare or acci- 

 dental. Accidental in Yucatan — one record. 



Black-throated blue warbler {Dendroica cxndescens) . West Indies. Key West — 

 sometimes not uncommon. Accidental in Guatemala and Colombia. 



Yellow-throated warbler {Dendroica dominica) . West Indies. Florida and locally 

 along coast to South Carolina. Accidental in Yucatan — one record. 



Kirtland warbler {Dendroica kirtlandi). Bahamas. 



Pine warbler {Dendroica vigorsii) .«' United States north to Virginia, Illinois, etc. 

 Accidental in Mexico; one record. 



Yellow palm warbler {Dendroica palmarum hypochrysea) . United States. Acci- 

 dental in Cuba and Jamaica. 



Prairie warbler {Dendroica discolor).. AVest Indies and other islands. 



Maryland yellow-throat ( Geothlypis trichas). United States and Bahamas. 



Florida yellow-throat ( Geothlypis trichas ignota). United States and Cuba. 



SYSTEMATIC REPORT. 



The present paper is devoted to a systematic account of the distri- 

 bution and migration of the North American warblers, numbering 59 

 species and 19 subspecies. In each case the breeding range is given 

 first, then the winter range, followed b}^ a synopsis of the time of 

 spring migration and of fall migration. Bibliographical references 

 relating to the occurrence of the various species in South America 

 are given in full. For the purposes of this article 'North America' 

 includes the mainland north of Mexico and also the peninsula of Lower 

 California, as in the Check- List of the American Ornithologists' Union; 

 and ' West Indies ' includes all the islands commonly known under that 

 name, except Tobago and Trinidad, near the coast of South America. 

 The name of each species is preceded by its number in the above- 

 mentioned Check-List. Most interest attaches to the movements of 

 the warblers of the eastern part of the United States that pass by flight 

 over water to their winter homes. These, therefore, receive full treat- 

 ment, while less is said of the migration of the western species that 

 make the journe}^ from the United States to Mexico and southward 

 entirely b}" land. Special attention has been paid to the definition of 

 the southern limit of the breeding range of each species — a subject 

 that for many years has received the careful consideration of the 

 Biological Surve3\ So far as known to the writer, the present paper 

 is the first attempt to define exactly the northern limit of the winter 

 range of each species, and also to indicate the altitudinal range of the 

 same in its winter home. 



The report is based largely on records received b}^ the Biological 

 Surve}^ from land stations and lighthouses, together with records 

 from countries south of the United States, especially Costa Rica, 



«The pine warbler of the Bahamas has lately been separated as subspecies achrus- 

 iero; the regular winter habitat of vigorsii is therefore entirely within the United 

 States, this being the only case of an eastern warbler confined to this country during 

 the winter. 



