THE ("OI>UN<; MOTH IX MICHIGAN, 



81 



Table LXXVIII. Instars of the codling moth larva of tJie second brood; head measure- 

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



1 Abnormal and not included in the summary. 



- Wintered. 



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

 for each instar; duration of instars; summary of Table LXX VIII. 



The records for the time of molting and the head measurements for 

 the separate instars for the first brood are given in Table LXXVI. 

 Of a total number of 14 larva'. 8 attained full growth. Of these. 

 2 passed through five instars and 6 through six instars. A single 

 larva (No. 8) that appeared stunted in its growth had seven instars. 

 but failed to reach maturity. One full-grown larva of this brood 

 wintered, while 7 resulted in moths the same year. Larva 1 \<>s. 1 1 to 

 14, inclusive, were left undisturbed during their early stages in order 

 that their development should not be unduly delayed. 



