180 



Annals Entomological Society of America [Vol. X, 



that a persistent quiescent condition was in no case brought 

 about by this treatment. Larvae and adults after twenty days 

 in ice box were immediately activated by high temperature. 



Figure 1 



In order to avoid confusion it would be well to state, at this 

 point, that in general hibernation in insects is characterized by 

 quiescence which persists for sometime after the temperature has 

 risen or continues through periods of high temperature. In 

 many cases the phenomenon manifests itself before the temper- 



