LIFE HISTORY OF THE CODLING MOTH IN MAINE. 



45 



THE SECOND GENERATION. 



SECOND BROOD OF EGGS. 



Length of incubation. — On August 20 the first egg of the second 

 brood was deposited. Oviposition continued until September 18, 

 reaching the maximum on August 31. Out of 138 eggs deposited 96 

 (69.56 per cent) hatched. The average incubation period was 

 10.208 days; maximum, 15 days; minimum, 8 days. The average 

 time from the time of egg deposition to the appearance of the red 

 ring was 4.754 days; maximum, 9 days; minimum, 3 days. The 

 average time for the appearance of the black spot was 8.368 days; 

 maximum, 14 days; minimum, 6 days. (See Table XXXIX. ) # 



Table XXXIX. — Length of incubation period of second-brood eggs, Winthrop, Me., 



1914. 



No. of 

 obser- 

 vation. 



Num- 

 ber of 



eggs. 



Date- 



Depos- 

 ited. 



Red 

 ring. 



Black 

 spot. 



Hatched 



Appearance of- 



Red Black 

 ring. spot. 



Incuba- 

 tion 

 period. 



Number 

 dead. 



Aug". 

 Aug. 

 Aug. 

 Aug. 

 ..do. 

 Aug. 

 ..do. 

 Aug. 

 Aug. 

 Aug. 

 ..do 

 Sept. 

 Sept. 

 Sept. 

 Sept. 



Days. 



Days. 



Days. 



Aug. 29 

 Aug. 30 



Sept. 2 



Aus;. 31 



?ept. 



Sept. 1 

 Sept. 4 

 Sept. 5 



Sept. 4 

 Sept. 6 

 ..do 



Sept. 12 

 Sept. 15 



...do 



Sept. 21 



Sept. 19 

 Sept. 21 



Sept. 4 



Sept." "5' 



...do 



Sept. 6 

 Sept. 8 

 Sept. 9 

 Sept. 8 

 Sept. 9 

 Sept. 21 



Sept. 22 



Sept. 13 



Sept'ii 

 Sept. 18 



5ept. 17 



Sept. 21 



Sept. 17 

 Sept. 22 



Sept. 20 

 Oct. 2 



Sept, 23 

 Sept. 24 

 Sept. 23 

 Sept. 24 

 Sept. 23 

 Oct. 3 



Average . . . 

 Maximum. 

 Minimum . 



5 



8 



5 



8 



7 



9 



5 



6 



5 



12 



5 



11 



4 



10 



9 



10 



4 



8 



4. 754 

 9 

 3 



8. 368 

 14 

 6 



10. 208 

 15 



SECOND BROOD OF LARV^. 



Time of hatching. — As will be noted in Table XXXIX, the first of 

 the second-brood larvae hatched September 4. The last of the second- 

 brood larvae hatched October 3. Hence the period of hatching was 

 about one month. 



Length of feeding period. — Observations on the length of the feeding 

 period was limited to 4 individuals. Many of the larvea which entered 

 the fruit failed to mature. The average feeding period was 42.750 

 days; maximum, 47 days; minimum, 38 days. The above records 

 are given in Table XL. 



