32 
THE GRAPE ROOT-WORM. 
located on the hill as compared with those in the valley. In Table 
XI is shown the time of hatching of eggs in the two named localities. 
On the hill the eggs were one week later in hatching, mainly as the 
result of later deposition. 
Fig. 15. — Curve showing time of egg deposition and relative abundance of eggs laid in rearing 
cages by beetles of the grape root-worm at North East, Pa., during 1909. (Original.) 
LONGEVITY OF MALE AND FEMALE BEETLES. 
On an average the beetles have lived in captivity one month. In 
Table VII will be found a full account of the length of life of individual 
male and female beetles. 
Table VII. — Length of life of individual male and female beetles of the grape root-worm 
as recorded in breeding cages at North East, Pa., during 1909. 
No. 
Sex. 
Date. 
Days. 
Emerg- 
ence. 
Died. 
Male. 
Fe- 
male. 
1 
3 
June 30 
Aug. 4 
35 
2 
9 
...do.... 
July 22 
22 
3 
3 
...do.... 
July 26 
26 
4 
9 
...do.... 
July 27 
27 
5 
3 
...do.... 
July 22 
22 
6 
9 
...do.... 
July 21 
21 
7 
3 
...do.... 
Aug. 19 
50 
8 
9 
...do.... 
Aug. 3 
34 
9 
3 
...do.... 
Aug. 8 
39 
10 
9 
...do.... 
Aug. 1 
32 
11 
3 
...do.... 
Aug. 26 
57 
12 
9 
...do. ... 
Aug. 2 
33 
13 
3 
...do. ... 
July 22 
22 
14 
9 
...do.... 
July 23 
23 
15 
3 
July 2 
Aug. 25 
54 
16 
9 
...do.... 
Aug. 9 
38 
17 
3 
...do.... 
Escaped. 
18 
9 
...do. ... 
Aug. 31 

60 
19 
3 
July 3 
July 23 
20 
20 
9 
.. .do 
July 24 
21 
21 
3 
July 9 
Aug. 10 
32 
22 
9 
...do.... 
Aug. 23 
45 
23 
3 
July 10 
Aug. 27 
"'48 
No. 
Sex. 
Date. 
Days. 
Emerg- 
ence. 
Died. 
Male. 
Fe- 
male. 
24 
9 
July 10 
Aug. 
11 
32 
25 
3 
.. .do 
Aug. 
6 
27 
26 
9 
...do.... 
Aug. 
4 
25 
27 
3 
...do.... 
Aug. 
14 
35 
28 
9 
...do.... 
Aug. 
26 
47 
29 
3 
...do.... 
Aug. 
23 
44 
30 
9 
...do.... 
Aug. 
24 
45 
31 
3 
July 11 
Aug. 
22 
42 
32 
9 
.. .do 
Sept. 
9 
CO 
33 
3 
July 12 
Aug. 
28 
34 
9 
.. .do 
...do 
28 
35 
3 
...do.... 
Aug. 
5 
24 
36 
9 
...do.... 
Aug. 
25 
44 
37 
3 
...do.... 
Aug. 
6 
25 
38 
9 
...do.... 
Aug. 
26 
41' 
45 
39 
3 
June 15 
Aug. 
25 
40 
9 
...do 
...do. 
41 
41 
3 
July 27 
July 
28 
1 
42 
9 
.. .do 
Aug. 
26 
30 
43 
3 
...do.... 
Aug. 
14 
18 
44 
9 
...do.... 
Aug. 
27 
31 
45 
3 
July 30 
Aug. 
15 
16 
46 
9 
.. .do 
Sept. 
22 
54 
