74 DECIDUOUS FRUIT INSECTS AND INSECTICIDES. 
The variations in the length of the pupal periods, as shown in 
Table II, extended from 15 to 30 days. 
TaBLE II.—Spring brood of pupx. Variations in the length of the pupal periods as 
recorded in Table I. 
Pupz.| Days. || Pupz. | Days. | 
= | 
3 15 10 22 | 
2 16 7 23 | 
1 17 12 24 
3 18 2 25 | 
1 19 1 31 
6 21 1 34 
The length of the stages were especially prolonged during the early 
part of the period of pupation and shortest toward the close of the 
period, due to a difference in the temperature. In Table III is 
given a summary of the observations recorded in Table I, showing 
an average pupal period of 22 days for the total number of observa- 
tions. 
TaBLE III.—Spring brood of pupx. Summary of pupal periods of Table I. 
oT 
Observations. | Days. 
AN GNA SOs oe cla ke ess I 2iL/o8 
A Fep-a baa) phaa) Sees, Aa eee ane 34 
Minin iis sees eee | 15 
SPRING BROOD OF MOTHS. 
Time of emergence of moths in the spring.—In figure 19 is shown 
graphically the time of emergence and the relative occurrence of 
moths of the spring brood. The records for these observations are 
given in Table IV. 
TABLE 1V.—Emergence of spring moths, 1909, from wintering material collected on 
banded trees during 1908. 
| | | 
Number Number || : Number | Number 
| Date. of moths. Date. of moths. || Date. cfmoths. || Pate. | of moths. 
| June 12 1 June 21 31 June 30 13/41) July 9) | 4 
Abia) ey ose l - June 22 23 July 1 25 July 10 2 
June 14 5 June 23 50 July 2 15 July 11 1 
June 15 3 June 24 40 July 3 3 July 14 2 
June 16 6 June 25 50 July 4 5 July 17 1 
June 17 13 June 26 33 July 5 10 
June 18 1 June 27 32 July 6 6 | 486 
June 19 10 June 28 35 July 7 8 
June 20 24 June 29 30 July 8 4 
Indoors, moths were observed previous to June 12, but since these 
undoubtedly had wintered in the house their appearance does not 
represent normal conditions, as is believed to be the case with mate- 
