28 



CALOSOM.V SYCOPHANT.V. 



number of individuals in the experiment (lied OMang to a scarcity of 

 food and other causes, but the following nine records give the length 

 of time which was spent in each larval stage and this may be con- 

 sidered as approximately correct for larvte that hatch early in the 

 season when the weather is cool and the food supply is somewhat 

 restricted. 



From the foregoing experiments data were secured regarding 

 the length of time in each larval stage. 



Table IV. — Record of time passed in different stages by larvae of Calosoma sycophanta 

 hatched from eggs laid by beetles taken out of hibernation in March and April. 



Average length of time in each stage: 



First larval stage 



Second larval stage 



Third or feeding stage 



Days. 

 ... 5i 

 ... 6* 

 ... 14i 



Total time larvae fed 2(14 



In order to check up this experiment and to determine the differ- 

 ence in time required for larvre to develop during hot summer weather 

 when food is abundant, another set of experiments was carried on 

 with larvae that hatched on June 20 and the results are tabulated as 

 follows : 



Table V 



-Length of time passed in different stages by larvx of Calosoma sycophanta 

 developed from eggs laid by beetles that emerged normally. 



Average length of life in feeding 



First larval stage 



Second larval stage , 



Third larval stage 



Days. 

 ... 2 

 ... 3 



Total 14 



