U. S. DEPARTMENT OF AGRICULTURE. 



DIVISION OF BIOLOGICAL SIffifET— BULLETIN No. 18. 



(;. HART MBRKIAM, CTifc/. 



DISTRIBUTION AND MIGRATION 



OF 



NORTH AMERICAN WARBLERS. 



BY 



^WELLS "W^ COOKE, 



ASSISTANT, BIOLOGICAL SUKVEY. 



WASHINGTON: 



GOVERNMENT PRINTING OFFICE. 

 1904. 



'"■"-- '■•■-'■ """ Wildlife Seraioe 



