Dec. io, 1913 
Calliephialtes Parasite of Codling Moth 
223 
A considerable portion of the larval life of Calliephialtes is passed in 
the cocoon. This period was determined for 116 female larvae and 404 
male larvae. The females, after spinning their cocoons, required, on the 
average, about 2)4 days longer to attain the pupal stage than did the 
males. This is probably somewhat less than the difference that would 
exist under natural conditions, inasmuch as the males under observa¬ 
tion were somewhat more inclined to extend this portion of their de¬ 
velopment beyond the normal than were the females. 
In Table III are brought together the data on that portion of the 
larval life passed within the cocoon. The figures include the prepupal 
period, which, not being a definite stage in the development of the insect 
but a transition stage, it is impossible to determine exactly. From 
this table are eliminated the data on 8 females and 11 males that re¬ 
mained in this condition for an abnormally long time. The actual 
maximum period recorded for females was 24 days and for males 3 6)4 
days. 
Table III .—Larval period of both sexes of Calliephialtes sp. in cocoon in various months , 
weighted average period for each month and for the season , and weighted average mean 
temperature for each period and for the season at Vienna, Va., IQI2. 
Average 
mean tem¬ 
perature 
for period. 
7 . 
78. o 
78. 2 
76. s 
74.8 
74.2 
72.7 
71. O 
72.4 
71.7 
67.7 
69. 6 
68.5 
71.1 
70.9 
72.4 
72. 1 
72. 1 
Larval period in 
cocoon. 
4 days... 
4.5 days. 
5 days... 
5.5 days. 
6 days... 
6.5 days. 
7 days... 
7.< days.. 
8 days.. . 
8.5 days. 
9 days... 
9.5 days, 
xo days.. 
10.5 days. 
11 days.. 
11.5 day's. 
12 days.. 
12.5 days. 
13 days.. 
13.5 days. 
14 days.. 
May 
and 
June. 
Total. . . . 
Weighted av¬ 
erage pe¬ 
riod, days. . 
Average tem¬ 
perature, 
O T> 
Females: Number of 
larvae pupating in- 
77 
IO. 2 
July. 
Aug. 
Sept. 
14 
8.0 
9 - 7 
7 
10. 4 
Total 
num¬ 
ber 
of fe¬ 
males. 
I 
1 
2 
4 
12 
7 
T 5 
11 
11 
6 
22 
4 
5 
108 
9.9 
Average 
mean tem¬ 
perature 
for period. 
May 
and 
June. 
a F. 
77.8 
77-7 
72 - 3 
74-4 
72. 2 
73 - 9 
70.9 
69. 6 
68.4 
67- 5 
68.8 
69. o 
69.1 
67. 7 
66.8 
67. 6 
70. 1 
Males: Number of 
larvae pupating in— 
I 
II 
13 
20 
17 
23 
22 
IO 
7 
5 
1 
2 
3 
i 3 S 
7-9 
July. 
1 
2 
II 
9 
34 
19 
23 
8 
10 
2 
1 
1 
3 
1 
125 
6.6 
Aug. 
I 
I 
1 
2 
24 
13 
20 
II 
14 
5 
10 
1 
2 
2 
108 
7.2 
Sept. 
Total 
num¬ 
ber of 
males. 
3 
12 
12 
70 
45 
67 
37 
56 
27 
24 
9 
11 
4 
7 
7 
25 393 
8.7 
7-4 
