The Migration of Vireos 



119 



FALL MIGRATION 



PLACE 



Waterloo, Ind. (near) . . 



Eubank, Ky 



Athens, Tenn 



St. Louis, Mo 



Shelter Island, N. Y. . . 

 Central New Jersey . . . 

 Philadelphia, Pa. (near) 



Washington, D. C 



Raleigh, N. C 



Number 



of years' 



record 



Average date of 

 the last one seen 



September 24 

 September 26 

 October i 



September 19 

 September 23 

 October 8 

 September 21 



Latest date of the 

 last one seen 



October i, 1903 

 October i, 1891 

 October 5, 1905 

 October 14, 1885 

 September 30, 1901 

 October 15, 1905 

 October 15, 1888 

 October 19, 1890 

 October 14, 1892 



MUTTON'S VIREO 



The several forms of this species range in the western United States from 

 western Texas to California and north along the Pacific slope to southern British 

 Columbia. Their short migration in southern .Arizona must be performed very 

 earlv in the season, for, by the middle of March, they had already reached their 

 breeding-grounds in the Huachuca mountains, at 5,000 feet altitude. The 

 birds of the Pacific region are slightly migratory, but many remain throughout 

 the winter so near the northern limit of the range, that no definite data are avail- 

 able as to the times of migration. 



BELL'S VIREO 



This species winters in Me.xico, and breeds from northeastern Mexico north 

 to Nebraska. It is one of the slower migrants, for the dates given below show 

 that it occupies five weeks in the journey from San Antonio, Texas, to Onaga, 

 Kansas, — an average speed of less than twenty miles a day. 



SPRING MIGRATION 



PLACE 



San .\ntonio, Tex 



Austin, Tex 



Bonham, Tex. . . . 

 St. Louis, Mo.. . . 



Keokuk, la 



Grinnell, la 



Sabula, la 



Manhattan, Kans 



Onaga, Kans 



Lincoln, Nebr.. . . 



■Number 



of years' 



record 



6 

 16 



FALL MIGRATION 



The average of the last seen for five years at Grinnell, la., is September, 

 and the latest September 12, 1886; at Onaga. Kans., for thirteen years, is Sep- 

 tember II, latest September 27, 1905. The latest date at Jasper, Mo., is Sep- 

 tember 20, 1902, and at St. Louis, Mo., September 22, 1905. 



