Contributions to Experimental Entomology 569 



have attained a longer life by one or two days under the influence 

 of the plus temperatures. 



I believe that these observations, although carried on with so 

 few individuals, nevertheless justify us in assuming that Bach- 

 metjew's supposition that an insect may remain without dying for 

 an indefinitely long period in an anabiotic condition, has received 

 its first experimental support. But we must not forget to limit 

 this statement to the adult insects, for the pupae of Actias selene 

 die even after a few days if they are subjected to freezing tem- 

 peratures. 



