24 



CALOSOMA SYCOPHAXTA. 



in 6, 3.6 per cent in 7, 0.8 per cent in 8, 0.3 per cent in 9, and 0.2 

 per cent in 10 days. 



That temperature has a predominant influence on the hatching 

 of the eggs can not be doubted, and in this connection the following 



Temperature Record-1909. 



Fig. 13.— Diagram showing temperature record during the summer of 1909, the total egg-laying record, 

 and the mortality of female Calosoma beetles for the same period. (Original.) 



data, secured from the United States Weather Bureau at Boston, 

 are of special interest. 



The accompanying diagram (fig. 13) shows that during each 

 period of high temperature there was an increase in the number of 



