Journal of Agricultural Research 
Vol. V, No. 20 
918 
FIRST GENERATION 
Table I. —Eggs produced by a single overwintered female of the Colorado potato beetle; 
male and female taken in copula on April 30, 1914, and placed in rearing jar 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 
a mass. 
Date. 
Number 
of eggs 
laid. 
Number 
of eggs to 
a mass. 
May 4 . ... 
17 
17 
May 15. .. 
24 
24 
May 25.. . 
4 
4 
5.... 
O 
0 
16. . . 
0 
0 
26... 
0 
0 
6 .... 
O 
O 
17... 
O 
0 
27... 
O 
0 
7.... 
O 
O 
18... 
16 
16 
28... 
O 
0 
8.... 
43 
43 
19... 
O 
0 
29... 
14 
14 
9.... 
0 
0 
20... 
O 
0 
30... 
16 
16 
10. ... 
67 
67 
21 ... 
IO 
10 
3 1 • * • 
24 
i»5> IO -8 
11. ... 
3 i 
3 i 
22. .. 
9 
9 
June 1 ... 
3 
3 
12. ... 
45 
45 
23... 
0 
0 
13.... 
28 
28 
24... 
10 
10 
Total.. 
379 
14.... 
18 
18 
1 The male in this experiment died on June 10, the female on June 14. 
Table II. —Eggs produced by a single overwintered female of the Colorado potato beetle; 
pair collected at College Park, Md., and placed in rearing jar on May it, 1914, with 
growing potato plant * 
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 
a mass. 
May 11.. 
78 
32,46 
May 31... 
70 
21, 18,31 
June 19... 
O 
0 
12. . 
5 1 
31,20 
June 1... 
25 
25 
20. . . 
5 
5 
z 3 • • 
3 1 
31 
2.,. 
21 
21 
21... 
O 
0 
14.. 
0 
0 
3 ■ • ■ 
O 
0 
22. . ., 
0 
0 
z 5 - • 
0 
0 
4... 
2 
2 
23 ... 
9 
9 
16.. 
0 
0 
5 - • • 
0 
O 
24... 
40 
40 
z 7 • * 
90 
36, 54 
6... 
0 
0 
25 ... 
14 
14 
18.. 
0 
0 
7... 
0 
O 
26. . . 
0 
0 
19.. 
36 
36 
8... 
0 
O 
27... 
0 
0 
20.. 
32 
32 
9... 
0 
O 
28... 
0 
0 
21.. 
34 
9 , 11,17 
10... 
6 
O 
29... 
0 
0 
22.. 
0 
0 
11... 
0 
O 
3 °- •• 
0 
0 
23- • 
0 
0 
12... 
0 
O 
July 1... 
0 
0 
24.. 
34 : 
34 
13--. 
0 
O 
2. . . 
0 
0 
25 -- 
72 
24,48 
14... 
0 
0 
3 * • • 
0 
0 
26.. 
29 
20,9 
I 5 - • ■ 
34 
34 
4... 
0 
0 
27.. 
25 
25 
16... 
0 
0 
5 --- 
24 
24 
28.. 
47 
47 
17... 
71 
52 ,19 
29.. 
33 
33 
18... 
5 ° 
5 ° 
Total.. 
994 
30.. 
28 
28 
1 The male died on June 7, the female on July 7. 
