MEASURES OF INSECT COLD HARDINESS. 



453 



80 



WATER CONTENT 



OF 



DIFFERENT INSECTS 



80 



g 



o 



UD 



60 



50 



10 



+ Popillio japonica 



* Dendroides canadensis 

 o Synchroa punctata 



Romaleum rufulum 



o 

 o 

 O 



20 



10 



FIG. 4. Water content of different insects during the season at which they 

 develop cold hardiness. Popillia japonica +, Dendroides canadensis X, Synchroa 

 punctata o, Romaleum rufulum 



