THE CODLING MOTH IN MICHIGAN. 



67 



time shortly after the blooming period of apple, so that the early lar- 

 vae will hatch after the setting of the young fruit. A full considera- 

 tion of climatic conditions during the }-ears 1909, 1910, and 1911 is 

 therefore given for a better interpretation of the life-history studies. 



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§ 





A self-recording thermometer of the type generally used by the 

 United States Weather Bureau was kept in the rearing shelter 

 throughout the seasons of 1910 and 1911, and the records of the tem- 

 perature conditions are given in Tables LXIX and LXX in degrees 

 Fahrenheit. The average daily temperature in these tables repre- 

 sents the averages from hourly readings for each day. The readings 



