CODLING MOTH IN SANTA CLARA VALLEY. 



131 



females, were collected on June 30, the second collection, while 27 

 male larvse, or 71 per cent of the total number of males, were taken 

 on the second collection. It is evident therefore that a larger per- 

 centage of the total number of males was influenced by a higher mean 

 temperature (on account of later collection in June) than females, 

 which would naturally lead one to expect a shorter average pupal 

 stage for the males in comparison with that of the females. Possibly 

 a few individuals with a long pupal stage in the male series of 38 

 individuals caused a greater influence on the average length of the 

 stage than the same number of individuals in the female series of 103 

 larvae would do. 



The average length of the pupal stage of all the larvae was 19.04 

 days, the maximum 55 and the minimum 11 days. (See Table XX.) 

 A summary of Tables XVIII and XIX is given in Table XX, showing 

 the variations observed in the length of the stages during the entire 

 period when pupae were found. 



Table XVIII. — Pupae of the first brood — Length of the pupal and cocoon periods of 38 

 male larvse collected in 1910 on banded trees. 



