LIFE HISTOKY OF CODLING MOTH IN PECOS VALLEY, N. MEX. 29 



Larval observations with reference to the length of the cocooning 

 period of this generation were limited to .26 individuals. Of this 

 total the greatest number, 6, completed the construction of the 

 cocoon in 4 days. The average length of this period was 6.48 days 

 as compared with 5.24 days for the first brood and 5.16 days for the 

 corresponding stage of the second generation. The records for the 

 cocooning period for the third generation are found in Table XXVI. 



Table XXVI. — The making of cocoons of the third brood of the codling moth, Roswell, 



N. Mex. % 1912. 



Date of leaving 



Num- 

 ber of 

 indi- 

 viduals. 



Length of cocooning period in specified days. 



Aver- 

 age 

 days. 



Mini- 

 mum 

 days. 



Maxi- 

 mum 

 days. 



Total 



fruit. 



2 



3 



4 



5 



6 



7 



8 



9 



11 



12 



14 



days. 



Aug 19 



2 

 1 

 1 

 1 

 2 

 2 

 2 

 2 

 1 

 2 

 3 

 3 

 1 

 1 

 2 





1 

 1 



1 



















3.5 

 3.0 

 4.0 

 4.0 

 3.0 

 6.5 

 6.5 

 6.5 

 9.0 

 6.5 

 9.0 

 9.3 

 4.0 

 14.0 

 8.5 



3 

 3 

 4 

 4 

 2 

 5 

 6 

 4 

 9 

 5 

 7 

 ' 8 

 4 

 14 

 5 



4 

 3 

 -4 

 4 

 4 

 8 

 7 

 9 

 9 

 8 

 12 

 11 

 4 

 14 

 12 



7 



21 



















3 



22 



1 

 1 

 1 



















4 



23 























4 



25 



1 





















6 



Sept. 1 



1 







1 











13 



2 .. 









1 



1 











13 



3 







1 







1 



1 









13 



4 





















9 



5 









1 







1 



1 

 1 









13 



6 











1 







1 





27 



7 













1 



1 



28 



8 







1 













4 



9 





















1 



14 



10 









1 













1 



17 

























26 



1 



2 



6 



3 



1 



2 



4 



3 



1 



2 



1 



6.48 







175 











THE THIRD BROOD OF PUPvE. 



Time of pupation. — Observations on pupation in the rearing cages 

 extended from August 19 until September 10, and experiments in this 

 instance were conducted with only 17 individual insects. The small 

 number available is due to the fact that large numbers of the larvae 

 of this brood proved to be wintering larvae. Of those observed the 

 greatest number having a specific period completed the pupal stage 

 in 13 days. The average time for the entire number under obser- 

 vation was 14.94 days; maximum, 20 days; minimum, 11 days. 

 The detailed results are shown in Table XXVII. 



