Feb. 14.1916 
Colorado Potato Beetle 
919 
Table III .—Eggs produced by a single overwintered female of the Colorado potato beetle; 
male and female collected at College Park, Md., and placed in confinement on May 10 , 
IQ14, with growing potato plant 1 
Date. 
Number 
of eggs 
laid. 
Number 
of eggs to 
a mass. 
Date. 
Number 
of eggs 
laid. 
Number 
of eggs to 
amass. 
Date. 
Number 
of eggs 
laid. 
Number 
of eggsto 
amass. 
• 5 * ! 
H 
H 
44 
44 
May 26 ... 
0 
0 
June 9... 
0 
0 
12. . . 
16 
16 
27... 
0 
0 
10... 
0 
0 
13 . . . 
0 
0 
28... 
0 
0 
11... 
0 
0 
14 ... 
0 
0 
29... 
25 
25 
12... 
0 
0 
15 - • • 
46 
46 
3 °... 
0 
0 
13. •• 
0 
0 
16... 
0 
0 
31 ... 
0 
0 
14... 
23 
23 
17... 
39 
39 
June 1... 
23 
23 
15... 
42 
42 
18... 
0 
0 
2... 
16 
16 
16... 
33 
33 
19... 
36 
19^7 
3 * • • 
0 
0 
17... 
0 
0 
20... 
11 
11 
4... 
0 
0 
18... 
0 
0 
21... 
0 
0 
5 --- 
0 
0 
19... 
0 
0 
22.. . 
0 
0 
6... 
0 
0 
20... 
16 
16 
2 3... 
0 
0 
7. .. 
10 
10 
24... 
0 
0 
8 ... 
0 
0 
Total. 
389 
25... 
0 
0 
1 The male died on June 23, the female on September 2. 
Table IV .—Eggs produced by a single overwintered female of the Colorado potato 
beetle; pair of adults taken in copulation and isolated in a rearing jar on Mayii,iQi4, 
with a growing potato plant 1 
Date. 
Number 
of eggs 
laid. 
Number 
of eggs to 
a mass. 
Date. 
Number 
of eggs 
laid. 
Number 
of eggs to 
a mass. 
Date. 
Number 
of eggs 
laid. 
Number 
of eggs to 
amass. 
May 11... 
57 
' 57 
June 4... 
56 
20,36 
June 28... 
0 
O 
12. . . 
IS 
15 
5 * * • 
41 
4 i 
29... 
O 
. O 
I 3 --- 
15 
15 
6... 
41 
4 i 
30... 
33 
33 
14... 
5 * 
58 
7... 
45 
45 
July x... 
42 
43 
15* • * 
0 
0 
8... 
35 
35 
2. . . 
0 
0 
16... 
54 
54 
9... 
60 
60 
3 * • ■ 
43 
43 
17... 
57 
57 
10... 
43 
43 
5 * • • 
35 
35 
18... 
0 
0 
11... 
57 
57 
6... 
0 
0 
19... 
33 
33 
12... 
84 
* 9 , 65 
7... 
47 
47 
20. . . 
25 
25 
13... 
47 
47 
8 ... 
61 
22,39 
21. . . 
21 
21 
14... 
54 
54 
9... 
13 
13 
22. . . 
3 1 
3 i 
J 5 - • • 
55 
55 
10... 
30 
30 
23... 
34 
34 
16... 
5 i 
5 i 
11... 
0 
0 
24... 
0 
0 
17... 
39 
39 
12... 
20 
20 
25... 
56 
18... 
46 
34,12 
13... 
0 
0 
26... 
26 
26 
19... 
3 i 
3 i 
14... 
0 
0 
27... 
27 
27 
20... 
0 
0 
15... 
13 
13 
28... 
0 
0 
21... 
7 
7 
16... 
8 
8 
29... 
37 
37 
22... 
1 
1 
17... 
16 
16 
30... 
42 
42 
23-.. 
0 
0 
18... 
0 
0 
3 1 * • • 
30 
30 
24... 
0 
0 
19... 
8 
8 
June 1... 
25 
25 
25... 
0 
0 
20... 
14 
14 
2.. . 
3 6 
36 
26... 
0 
0 
3 • • * 
0 
0 
27... 
0 
0 
Total. 
1.879 
1 The male died on August r, the female on August 20. In this experiment the duration of egg-laying 
extended over a period of 70 days, or 10 weeks. 
