Jones, ox Spring Migration of 190T. 



107 



Oberliu, O. Tiffin. O. Princeton, 

 N.J. 



Species 144 112 84 



As a further contribution to the subject under discussion 

 the appended table of comparisons of four locaHties is in 

 point. I have selected these locaHties because the lists sub- 

 mitted seem to me to represent about equally careful work and 

 because they contain a considerable number of species common 

 to each, thus affording opportunity for fair comparisons. 

 Bristol, Conn., and Bloomfield. N. J-, may be taken as two 

 supplementary localities, and Youngstown and Oberlin, Ohio, 

 as two others of the same sort for the middle west. It is 



