258 
The remaining portions of the second generation and all of the third 
generation belong to the hibernating generation. 
Of the hibernating generation, the total life period of 24 males 
varied from 286 days to 329 days, the average being 312 days, and that 
of 60 females varied from 288 to 330 days, the average being 314 days, 
and the average of both males and females being 313 days. 
The maximum periods are for individuals whose larve left the fruit 
early in August, and the minimum periods for those whose larve left 
the fruit late in the fall. Larve which left the fruit late in the fall 
pupated and developed into moths at the same time as those which left 
the fruit earlier in the season as will be shown later on. 
OVIPOSITION 
Most of the first-generation females began to deposit eggs on the 
first or second day after emerging. The maximum number of eggs were 
laid on the second day. Oviposition ceased after the ninth day. The 
ee number of eggs laid by each female was 39 in 1915 and 47.3 in 
Oviposition by females of the second generation began later, but a 
majority of the moths had begun to oviposit by the third day. The 
maximum number of eggs in 1915 was laid on the sixth day and in 1916 
on the second day after the emergence of the adults. This difference 
was no doubt due to the lower temperatures which prevailed in 1915. 
The average number of eggs laid by each female in 1915 was 66.3 and in 
1916 it was 68.7. 
Oviposition by females of the hibernating generation takes place in 
the spring when the weather is cool. Very few females begin to ovi- 
posit on the first day after emerging, and a majority do not begin to 
oviposit till the fourth day. The maximum number of eggs was laid 
on the fourth day after the emergence of the female in 1915 and 1916 
and on the fifth day in 1917. Oviposition practically ceased after the 
tenth day but a few eggs were laid as late as the sixteenth day. The 
average number of eggs laid by each female varied from 30.5 in 1916 to 
42.4 in 1917. Low temperatures and heavy precipitation delay oviposi- 
tion. 
Adults when confined in small cages do not act normally. They 
attempt to escape from the cage and soon become disabled. Doubtless 
in the open the females live longer and deposit a larger number of eggs 
than the averages above given. The maximum number of eggs laid by 
a single female was 172, the next highest numbers were 167, 156, 143, 
136 and 120. 
RELATION OF TEMPERATURE TO LENGTH OF 
DEVELOPMENT PERIOD 
The total effective day-degrees which accumulated during the three 
development periods were determined in two ways: first, by adding to- 
gether the total effective day-degrees of the egg, larval, and pupal periods 
