THE STRIPED PEACH WORM. 7 
The average length of life of the adults is seen to be 10.6 days. 
From observations made in 1915, however, one adult was found to 
live 31 da} r s, and eight moths emerging previous to May 24 were 
alive a month later. These moths were not supplied with food. 
HABITS OF THE MOTHS. 
The adults are not often seen in the field because of their small 
size and inconspicuous coloring. They are difficult to follow when 
seen because of their habit of short irregular nights and their re- 
semblance when at rest to the color of the twigs of the host plant. 
The characteristic resting position is shown in Plate III, figure 3, 
from a photograph of a live specimen. One pair of adults was ob- 
served in copulation in a rearing cage on June 21, 1916, at 10.30 
a. m. The heads of the male and female were in opposite directions 
and no parts were in contact except the genital organs. Both moths 
remained quiet during copulation. 
FIRST BROOD. 
Incubation. 
In Table III the incubation period for the eggs deposited each day 
is shown. It will be seen that there was a variation of from 10 to 
19 days in the incubation period, and even with eggs deposited the 
same day on the same fruit and thus subjected to the same external 
conditions there was a variation of five days. The average length 
of the incubation period was 13.18 days. 
Table III. — Incubation period of first-brood eggs of the striped peach worm at 
Benton Harbor, Mich., 1915. 
Date of 
oviposi- 
tion. 
Number 
of eggs 
depos- 
ited. 
Date of 
hatching. 
Number 
of larvae. 
Egg stage. 
Date of 
oviposi- 
tion. 
Number 
of eggs 
depos- 
ited. 
Date of 
hatching. 
Number 
of larvae. 
Egg stage. 
June 2... 
June 3... 
June 5... 
June 6... 
11 
6 
4 
28 
2 
20 
3 
June 15 . 
(June 16.. 
{June 19.. 
[June 20.. 
June 21.. 
f June 20.. 
J June 23.. 
1 June 24.. 
1 June 25.. 
June 23.. 
June 26. . 
June 27.. 
11 
1 
2 
1 
3 
23 
• 1 
3 
1 
2 
20 
2 
Days. 
13 
13 
14 
15 
16 
14 
17 ! 
18 
19 
13 
14 
15 
June 16.. 
June 18.. 
June 20.. 
June 26.. 
Total . . 
6 
29 
4 
5 
[June 26.. 
{June 27.. 
(June 28.. 
[June 28.. 
I June 29.. 
I June 30.. 
Uulyl... 
June 30.. 
July 7... 
2 
2 
1 
10 
13 
5 
1 
2 
1 
107 
Days. 
10 
11 
12 
10 
11 
12 
13 
10 
11 
118 
June 12.. 
Maximum egg stage days. . 19 
Minimum egg stage do 10 
Average egg stage do 13. 18 
