EMEEGEISrCE FKOM HIBERNATION, 1907. 



79 



primarily to the starting of the experiment about twelve days later 

 than in the other two localities. 



The significance of the time of beginning the experiments is well 

 emphasized by the records for sections 2 and 6 at Calvert. These 

 two sections furnished by far the highest percentages of survival at 

 that place, and apparently the only fact explaining this is that the 

 experiment was started in each case at the time wliich was most 

 favorable for successful hibernation, i. e., about November 25. This 

 date was ten or twelve days later than those for sections 3 and 9, 

 which present the next higher percentages of survival. An average 

 of these two sections shows that among the weevils starting hiber- 

 nation about November 12, 14.5 per cent survived, while among 

 those starting hibernation about November 25, about 26.5 per cent 

 survived. 



The records for Dallas show that the three highest percentages of 

 survival occurred in sections 11,9, and 3, which were started between 

 November 12 and 15. 



In each locality the average date for the termination of emergence 

 occurred between May 22 and 29. It is evident, therefore, that 

 during 1906 the period of emergence from hibernation covered 

 practically three months for an average of all of the sections and 

 slightly more than four months for the last emerged weevils. 



MONTHLY SUMMARY OF EMERGENCE RECORDS. 



While it is important to know, approximately at least, the maxi- 

 mum limit of the emergence period, it may seem more desirable to 

 determine the time at which a majority of weevils surviving had 

 emerged. It is more convenient in using the records to compare 

 them in four-week periods rather than according to calendar months. 



Table XL. — Emergtmce in 1907, hy four-week periods. 



WEEKLY EMERGENCE RECORDS. 



The following table presents a summary of the daily emergence 

 records for each section during seven-day periods from March 1 to the 

 end of the hibernation period. These records are particularly inter- 



