346 



Table X. Showing actual and calculated time for incuTiation of eggs of all gen- 



eratio-ns of moths recorded by Glenn at Olney, 191o-1917, on a basi» of 



160 as the normal substitution-quotient. 



The results are averaged for groups of 60 eggs unless otherwise indicated. The 

 mean ratio of actual to calculated time for each generation is given here to aid in 

 determining the effects of factors other than temperature and humidity. 



