LIFE HISTORY OF THE CODLING MOTH IX MAINE. 



35 



Length of the feeding period of the transforming larvse. — During the 

 season of 1914 two methods, namely, the stock-jar and bagged- 

 fruit methods, were used for determining the feeding period of the 

 first-brood larva?. These methods are described on page 10. 



As in 1913, only a very small number of the first-brood larva? 

 transformed to first-brood moths. Out of a total of 845 larva? reared 

 at the laboratory 12 (1.4 per cent) transformed. 



In Table XXIX is given the length of the feeding period of the 

 transforming larvae of the first brood (stock-jar method). The aver- 

 age length of the feeding period for male and female larva? was 19.666 

 days; maximum, 21 days; minimum, 17 days. Average for male lar- 

 va 1 , 21 days; maximum, 21 days; minimum, 21 days. Average for 

 female larva?, 19.285 days; maximum, 21 days; minimum, 17 days. 



Table XXIX. — Length of feeding period of transforming larvae of the first brood, stock- 

 jar method, Winthrop, Me., 1914. 





Date of— 







No. of 

 observa- 





Sex. 



Days of 

 feeding. 







tion. 



Hatch- 



Leaving 







ing. 



fruit. 







1 



Julv 6 



July 24 



9 



18 



2 



...do 



July 27 



8 



21 



3 



July 8 



...do.... 



9 



19 



4 



...do.... 



July 28 



9 



20 



5 



...do.... 



July 29 



8 



21 



6 



July 9 



...do 



9 



20 



7 



Julv 10 



July 27 



9 



17 



8 



...do.... 



July 31 



9 



21 



9 



July 13 



Aug. 2 



9 



20 



Average length of feeding period, male and female larva?, 19.666 days; male, 21 days; female, 19.285 days. 

 Maximum length of feeding period, male and female larvse, 21 days; male, 21 days; female, 21 days. 

 Minimum length of feeding period, male and female larvae, 17 days; male, 21 days; female, 17 days. 



The length of the feeding period of the transforming larva? of the 

 first brood (bagged-fruit method) is given in Table XXX. The 

 average length of the feeding period was 25.333 days; maximum, 26 

 days; minimum, 24 days. The average for the male larva? was 25 

 days : maximum, 26 days; minimum, 24 days. No record for female 

 larvae wras secured. 



The average feeding period for all transforming larva? was 21.082 

 days, as given in Table XXXVIII. 



Table XXX. Length of i 'he feeding 'period, of transforming larvae of the first hrood, 

 iHigged-friiit method, Winthrop. Me., l!>lj. 



No. of 

 tlon, 



Date of— 



Sex. 



Days of 

 feeding. 



Batch- 

 ing. 



Leaving 



Inn:. 



i 



2 



3 



July 1") 



Aug. 10 





26 



Julv 17 

 Julv 19 



...do... . 



Aug. 11 



.' 



21 

 26 



;e length of feeding period male and female larvaa, 25.333 daj ; male, 25 days, 

 im length of feeding period, male and female larva:, 28 days; male, 20 days. 

 \iin iui 1 1 in length ol feeding period, m lie and female larv£B, 24 days; male, 24 da] . 



