263 
Data based on the band collections give in a general way the dis- 
tribution as to relative numbers of individuals of each stage throughout 
the season; the life history data indicate only approximately the general 
periods during which the different stages of each generation occurred. 
Since only a small number of individuals were used in the life-history 
observations as compared with the number of individuals in the whole 
_orehard, activities in the orchard, no doubt, began somewhat earlier 
and continued somewhat later than the life history data indicate. This 
is especially true in regard to the date of the deposition of the last eggs, 
the hatching of the last larve, etc., of each generation, because usually 
the last individuals were very few in number and were mostly females, 
many of which died without oviposition or laid infertile eggs. 
Hibernation, 1915.—The first larve to hibernate left the fruit be- 
tween July 3 and July 7. There was a period of three cool days, includ- 
ing July 4, 5, and 6, when the mean daily temperatures were 65.2, 61.1 
and 65.5 degrees F. respectively. For the remainder of July the tem- 
perature was much higher. The cool days no doubt account for the early 
hibernation of some of the larve which left the fruit from July 3 to July 
7. Hibernation proper began with larve which left the fruit between 
August 3 and August 6, after which the per cent. that hibernated in- 
creased rapidly until August 20. Practically all larvee maturing after this 
date hibernated. The weather during the second week in September was 
unusually warm and it was expected that larve would again begin to 
transform, but only three out of about 1000 which were under observa- 
tion responded to this increased temperature. 
Of the total number of larve collected, 46.2 per cent. were males 
and 53.8 per cent. were females; 29.1 per cent. of the males and 30.1 per 
cent. of the females collected, transformed; and 70.9 per cent. of the 
males and 69.9 per cent. of the females hibernated. 
SUMMARY OF THE SEASONAL HIsTory, 1915 
From the foregoing data the seasonal history of the codling-moth at 
Olney in 1915 may be constructed quite accurately (Table 28, preceding 
this page). 
, 
