Vol. XX.X 



,,,,;; j Cooke, Thi Relation of Bird Migration to the Weather. 207 



Catbird 



Water-Thrush 



Black-throated Green Warbler 



Wilson's Warbler 



Veery 



Solitary Vireo 



Nashville Warbler 



Scarlet Tanager 



Etose-breasted Grosbeak 



Tennessee WarhltT 



average date of arrival 



A queer state of affairs is witnessed in the spring of 1892 when 

 the temperature for a large part of the migration season was de- 

 cidedly below the average. The birds arrived late but even then 

 did not wait until the temperature had arisen to their normal. 



