10 



Royal N. Chapman 



In table 2 are contained the results of a series of experiments which 

 began on June 30, 1917, before sunrise, while the temperature was low, 



TABLE 2. Reactions of 82 Beetles to Mechanical Stimulation 

 (Tested in succession as indicated, with rising temperature) 



Number of beetles that 



Temperature 



Number of beetles that 



Temperature 



Con- 

 tracted 



Flew 



Clung 



Con- 

 tracted 



Flew 



Clung 



1* 

 1* 





1 



1 



14.5°C. 



1 



1 

 1 



1 



1 

 1 

 1 

 1 

 1 

 1 



1 



1 

 1 

 1 



1 



1 

 1 

 1 

 1 

 1 

 1 



19.5° 







1 



1 

 1 



15.5° 







1 

 1 



1 



1 

 1 



1 



1 

 1 



20.5° 



If 

 1 



1 



1 



1 

 1 



18.5° 



1* 



1 



1 



1 

 1 

 1 

 1 

 i 



1 



1 

 1 

 1 

 1 

 1 

 1 

 1 

 1 

 1 

 1 

 1 

 1 



1 

 1 



1 

 1 

 1 



1 

 1 

 1 



24° f 



1 

 1 



1 

 1 



1 



1 

 1 



1 



1 



1 

 1 



1 



1 

 1 

 1 



1 

 1 



1 



1 



1 



1 

 1 

 1 



1 



19° 





* Beetle fell into water. 



t Direct light from the rising sun began to fall on the plants at this time. 



