8 BULLETIN 261, U, S. DEPARTMENT OF AGRICULTURE. 
bark, or very often were rather insecurely glued to the sides and 
bottom of the jar as well. 
From Table III it will be seen that the moths began to oviposit in 
from 1 to 3 days after emergence, the average for seven observations 
being 1.7 days. On the average, oviposition lasted 2.3 days, the 
longest period observed being 4 days and the shortest 1 day. Girault 
records three moths that oviposited in confinement, in the insectary 
at Washington, May 8, 1905, the duration of oviposition being 2 days. 
Table III. — Orivosition of 'the spring brood of 'moths of 'the plum borer. Winchester. Va., 
1913. 
Date of— 
Days— 
Xo. of 
Number 
From 
cage. 
of moths. 
Emer- 
gence. 
First 
ovipo- 
sition. 
Last 
ovipo- 
sition. 
Before 
ovipo- 
sition. 
Of ovi- 
position. 
emer- 
gence to 
last ovi- 
position. 
1 
6 
Apr. 26 
Apr. 29 
Mav 2 
3 
4 
- 
2 

May 2 
Mav 3 
6 
1 
-t 
5 
3 
3 
3 
6 
6 
3 
1 
4 
4 
8 
4 
" 5 
6 
1 
2 
3 
5 


i 
7 
n 
1 
3 
6 
2 

6 
7 
1 
2 
3 
7 
6 
6 
• 
8 
1 
2 
3 
Maximum. 
3 
4 
7 
Minimum 
1 
1 
3 
Ave 
rage 
1. 7 
2.3 
4 
Copulation was never observed, but evidently occurred very soon, 
since in several instances fertile eggs were deposited within 24 hours 
of emergence. In the absence of the male the female deposits infer- 
tile eggs freely. 
The number of eggs deposited in confinement per female is indicated 
in Table IV. 
Table IV. — Xumber of eggs of the plum borer deposited per female in confinement, 
Winchester, Va., 1913. 
Date. 
Xo. of 
females 
under 
obser- 
vation. 
Xumber of eggs. 
Depos- 
ited. 
Depos- 
ited per 
female. 
April 26 
Mav 2 
3 
Average... 
Maximum . 
Minimum.. 
32.2 
Records were kept of the number of eggs laid, in two jars contain- 
ing 2 females each and in two jars containing 1 female each. The 
