66 THE PLUM CURCULIO. 
Table XXV. — Length of time spent in fruit by plum curculio, Illinois, 1904. 
Months. 
Total num- 
ber of 
larvae 
emerging. 
Percentage 
of whole. 
Average 
time in 
fruit. 
254 
662 
272 
50 
20.52 
53.47 
21.97 
4.04 
Davs. 
'18.07 
July 
19.15 
21 55 
26. 00 
Total . 
1,238 
100. 00 
The average time for egg and larva in the fruit for the whole season 
was about 20 days. 
In Table XXVI are given records of a few observations from 
Youngstown, N. Y. (1905), and North East, Pa. (1906). 
Table XXVI. — Length of time spent in fruit by the plum curculio (egg and larval stages 
combined), Youngstown, N. Y., 1905, and North East, Pa., 1906. 
Eggs 
depos- 
ited. 
Date of depo- 
sition. 
Larvae emerged 
Ap- 
proxi- 
mate 
time 
in 
fruit. 
Total 
num- 
ber of 
larvrr 
devel- 
oped. 
Total 
num- 
ber of 
egg and 
larval 
days. 
Aver- 
age 
Localities. 
X um- 
ber. 
Date. 
num- 
ber of 
days 
in 
fruit. 
43 
(?) 
June 24.1905 
fJune 13.1906 
June 14.1906 
[June 15,1906 
f 8 
1 
1 3 
1 5 
{ I 
6 
4 
July 10,1905 
July 12,1905 
July 13.1905 
July 14.1905 
July 9, 1906 
July 3,1906 
July 5,1906 
July 3. 1906 
Davs. 
16700 
18. 25 
19.00 
20.00 
25. 50 
21.00 
20. 75 
18.00 
1» 
} ' 
6 
4 
303. 25 
169. 50 
124. 50 
72.00 
17. S3 
24.21 
20.75 
18.00 
Total 
34 
669. 25 
Average time spent in fruit during June for both localities days. . 19. 68 
During 1905, at the insectary in Washington, data were obtained 
on the length of time spent in the egg and larval stages in the fruit 
for miscellaneous lots during May and June. As in the case of egg- 
hatching records, these were obtained under the same conditions in 
the insectary, where the temperature was higher than normal. These 
records are given in Table XXVII. 
