CODLING MOTH IN COLORADO. 



75 



were confined in the same cage. However, one moth, a male, lived 

 until September 30, 24 days after the last moth emerged. The last 

 female died September 28, 22 days after the last moth emerged. 



Life Cycle of the Second Generation. 



The data on the life cycle of the second generation, as given in 

 Table LILT, include 161 individuals. The summary of the records 

 gives an average for the incubation period of 6.01 days, larval feed- 

 ing period 18.08 days, cocooning period 4.78 days, pupal period 

 13.52 days, and life cycle 42.40 days. To determine the length of the 

 complete life cycle of this generation for 1916, approximately 3 

 days should be added to these figures, since as noted in a previous 

 paragraph headed " Time of oviposition," 3 days elapsed between 

 the date of emergence of the first female moth and the date the first 

 egg was deposited. 



Table LIII. — Life cycle of the second generation of the codling moth, as 

 observed by rearing, stock-jar feeding method. Grand Junction, Colo., 1916. 



Date of 



Num- 

 ber of 



Incu- 



Larval feeding 

 period. 



Cocooning period. 



Pupal period. 



Life cycle. 



egg depo- 

 sition. 



indi- 



ba- 





















vid- 



tion. 





























uals. 





Av. 



Max. 



Min. 



Av. 



Max. 



Min. 



Av. 



Max. 



Min. 



Av. 



Max. 



Min. 







Days. 



Bays. 



Days. 



Days. 



Days. 



Days. 



Days. 



Days. 



Days. 



Days. 



Days. 



Days. 



Days. 



July 3 



22 



6 



16.45 



19 



14 



5.00 



7 



4 



13.04 



15 



11 



40.50 



46 



35 



4 



20 



6 



17.00 



21 



14 



4.60 



6 



3 



13.25 



16 



11 



40.85 



46 



36 



5 



24 



6 



19.00 



24 



15 



4.79 



6 



4 



14.12 



16 



12 



43.91 



50 



37 



6 



34 



6 



17.85 



25 



14 



4.35 



7 



3 



13.38 



16 



11 



41.58 



51 



36 



7 



12 



6 



18.16 



23 



15 



4.58 



6 



3 



13.50 



15 



12 



42.25 



49 



36 



8 



17 



6 



18.64 



21 



15 



4.64 



8 



3 



13.29 



15 



12 



42.58 



48 



36 



9 



7 



6 



18.00 



21 



15 



5.85 



14 



3 



13.57 



14 



13 



43.42 



51 



37 



10 



9 



6 



18.44 



20 



16 



4.00 



5 



2 



13.77 



15 



13 



42.22 



45 



39 



11 



5 



6 



20.20 



22 



18 



5.20 



7 



4 



13.40 



14 



12 



44.80 



47 



41 



12 



3 



6 



19.66 



23 



17 



6.00 



10 



4 



14.33 



15 



14 



46.00 



54 



41 



13 



1 



6 



20.00 



20 



20 



6.00 



6 



6 



14.00 



14 



14 



46.00 



46 



46 



13 



2 



7 



21.00 



24 



18 



5.50 



7 



4 



13.50 



14 



13 



47.00 



51 



43 



15 



2 



6 



18.00 



19 



17 



5.00 



6 



4 



15.50 



16 



15 



44.50 



47 



42 



16 



2 



6 



21.00 



22 



20 



9.50 



10 



9 



14.00 



14 



14 



50.50 



52 



49 



20 



1 



6 



19.00 



19 



19 



5.00 



5 



5 



14.00 



14 



14 



44.00 



44 



44 



161 



6.01 



18.08 



25 



14 



4.78 



14 



2 



13.52 



16 



11 



42.40 



54 



35 



THE THIRD GENERATION. 



Eggs of the Third Brood. 



Time of deposition. — The moths of the second brood commenced 

 to deposit third-brood eggs on August 12 and on September 10 laid 

 the last egg that fully developed. One egg was laid much later, 

 September 21, but this failed to reach maturity. The largest number 

 of eggs laid in any one day, 223, was deposited on August 27. For 

 further details of the time of oviposition see Table LIV and figure 29. 



