80 



DF.CTDUOUS FRUIT INSECTS AND INSECTICIDES. 



Table LXXVII. Larval instars of the codling moth; head measurements in millimeters 

 for each instar; days duration of instars. Summary of Table LXX VI. 



In the course of these studies there was a rather high percentage of 

 mortality, but this was mainly due to the difficulty in properly remov- 

 ing the larvae from the fruit. 



Table LXXVIII. — Instars of the codling moth larvae of the second brood; head measure- 

 ments in millimeters; days duration of the instars; Douglas, Mich., 1911. 



' Abnormal and not included in the summary. 



