28 
BULLETIN 911, U. S. DEPAETMENT OF AGEICULTUEE. 
Table XXXI. — Time of emergence and sex of first-brood moths of the grape-berry moth, 
Sandusky, Ohio, 1918. 
Date of 
Number of moths. 
Mean 
daily 
tem- 
pera- 
ture. 
Date of 
emer- 
gence. 
Number of moths. 
Mean 
daily 
emer- 
gence. 
c? 
9 
§ 
Total. 
S 
9 
? 
Total. 
tem- 
pera- 
ture. 
July 23 
24 
25 
26 
27 
28 
29 
30 
31 
Aug. 1 
2 
3 
4 
5 
6 
7 
8 
9 
..... 
1 
..... 
..... 
1 
6 
..... 
2 
5 
4 
4 
1 
8 
6 
4 
2 
2 
2 
6 
9 
3 
5 
9 
2 
15 
3 
16 
9 
7 
7 
18 
26 
15 
1 
10 
9 
5 
12 
9 
8 
15 
.... 
6' 
i 
i 
3 
2 
2 
3 
...... 
2 
2 
i" 
..... 
6 
11 
4 
5 
11 
3 
20 
6 
24 
12 
9 
9 
23 
34 
19 
2 
18 
17 
11 
14 
10 
10 
19 
°F. 
78 
76 
80 
78 
78 
78 
78 
66 
66 
66 
72 
66 
78 
85 
94 
91 
86 
78 
78 
80 
79 
82 
80 
Aug. 15 
16 
17 
18 
19 
20 
21 
22 
23 
24 
25 
26 
27 
28 
29 
30 
31 
Sept. 2 
4 
5 
6 
Total.. 
1 
..... 
...... 
7 
6 
14 
9 
3 
2 
1 
1 
1 
2 
..... 
i" 
14 
3 
1 
9 
17 
25 
20 
23 
17 
9 
9 
4 
6 
10 
5 
2 
2 
2~ 
3 
2 
2 
1 
1 
15 
3 
2 
9 
19 
34 
29 
39 
28 
13 
12 
5 
7 
11 
7 
2 
2 
1 
1 
1 
3 
74 
71 
68 
70 
68 
70 
78 
78 
82 
76 
74 
76 
72 
73 
72 
69 
68 
70 
10 
11 
12 
13 
14 
1 
1 
2 
68 
63 
62 
106 
399 
35 
540 
PROPORTION OF SEXES OF FIRST-BROOD MOTHS. 
Table XXXII. — Proportion of sexes of first-brood moths of the grape-berry moth, 
Sandusky, Ohio, 1918. 
Sex of moth. 
Number 
of 
moths. 
Percent- 
age of 
sexes. 
106 
399 
35 
21.00 
79.00 
Total 
540 
100.00 
The proportion of sexes as shown in Table XXXII maintains the 
preponderance of females that has been shown in previous tables. 
OVIPOSITION BY FIRST-BROOD MOTHS. 
A single record of oviposition and incubation was secured. In a jar 
containing 14 male moths and 12 female moths, all of which emerged 
on August 22, 5 eggs were deposited on August 26 and hatched on 
September 2. The period from emergence to oviposition was there- 
fore 4 days and the incubation period 7 days, 
NUMBER OF TRANSFORMING AND OVERWINTERING INDIVIDUALS 
OF FIRST BROOD. 
In Table XXXIII are presented the data on the overwintering 
first-brood individuals. 
It will be seen that the first larva to hibernate left the fruit on 
August 2 and that the number gradually increased as the season 
progressed. 
