V °'ig*f U ] Cooke, Routes of Bird Migration. 



Migration Route from Mexico to Texas by Water. 



Kingbird {Tryannus tryannus). 

 Green-crested Flycatcher (Bmpidonax virescens). 

 Bobolink (Dolichonyx oryzivorus). 

 Scarlet Tanager {Piranga erythromelas). 



Red-eyed Yireo (Vireo olivaceus). 

 Black and White Warbler [Mniotilta varia). 

 Prothonotary Warbler (Protonotaria citrea). 

 Worm-eating Warbler (Helmithero* vermivorus). 

 Golden-winged Warbler (Helminthopkila chrysoptcra). 

 Parula Warbler (Compsothlvpis americana subsp. ?). 

 Cerulean Warbler (Dendroica ccrulea). 

 Chestnut-sided Warbler (Dendroica pensylvanica). 

 Bay-breasted Warbler (Dendroica castanea). 

 Kentucky Warbler (Geo/hlypis formosa). 

 Mourning Warbler (Geolhlypis Philadelphia). 

 Wilson Thrush (Hylocichla fuscescens). 

 Gray-cheeked Thrush (Hylocichla alicice). 



II. Migration Route between Florida and Yucatan. 



The senior editor of 'The Auk' in reviewing my paper on 

 ' Some new Facts about the Migration of Birds ' makes this state- 

 ment in regard to the routes of migration across the Gulf of 

 Mexico : "It would be interesting to know to what extent some of 

 these generalizations rest on negative evidence, for stations along 

 the eastern coast of Mexico, including Yucatan, where observa- 

 tions have been made bearing on the migration of birds are cer- 

 tainly few and far between, and cover only short periods." 



The paper in question did not seem the proper place for pre- 

 senting the original data that served as the basis for these state- 

 ments. These data are now given that each one may judge for 

 himself as to the correctness of the conclusions. 



As a preliminary it may be stated that the dates of spring 

 arrival in Louisiana and Mississippi are, for most species, earlier 

 than the time at which these same species appear in northern 

 Florida and northern Texas. This seems conclusive evidence 

 that the Louisiana and Mississippi birds reach the United States 

 by a flight across the Gulf of Mexico. Indeed, except in the case 



