finiucraity of 



ORONO 



BULLETIN 267 



NOVEMBER, 1917 



THE APHID OF CHOKE CHERRY AND GRAIN. 



CONTENTS 



Description of Spring Generations on Choke Cherry 



Description of Grain Generations 



Summer Food Plants 



Life Cycle _ 



Discussion of Name 



Three Grain Aphids of Maine 



PAGE 



293 

 295 

 295 

 295 

 295 

 Fig. 32 



