920 
Journal of Agricultural Research 
Vol. V. No. so 
Table V.— Eggs produced by a single overwintered female of the Colorado potato beetle; 
male and female in copula isolated on May it, IQ14, with growing potato in rearing 
jar 1 
Date. 
Number 
of eggs 
laid. 
Number 
of eggs to 
amass. 
Date. 
Number 
of eggs 
laid. 
Number 
of eggs to 
amass. 
Date. 
Number 
of eggs 
laid. 
Number 
of eggs to 
amass. 
May 14.. 
36 
3 ^ 
June 3.. 
O 
0 
June 23.. 
6 
6 
x 5 - • 
0 
0 
4.. 
39 
39 
24.. 
0 
0 
16.. 
43 
43 
5 “ 
45 
14 , 3 1 
25 “ 
16 
16 
17.. 
0 
0 
6.. 
43 
43 
26.. 
0 
0 
18.. 
20 
20 
7 “ 
35 
35 
27 “ 
11 
11 
19.. 
0 
0 
8.. 
46 
33 ,13 
28.. 
0 
0 
20.. 
0 
0 
9 “ 
' 54 
54 
29.. 
38 
38 
21.. 
54 
27,27 
10.. 
63 
34,ix, 18 
„, 30.. 
0 
0 
22.. 
0 
0 
11.. 
62 
30,32 
July x.. 
0 
0 
23 “ 
32 
32 
12.. 
24 
24 
2. . 
20 
20 
24.. 
33 
33 
13 “ 
57 
57 
3 “ 
8 
8 
25 “ 
19 
19 
14.. 
34 
34 
4 “ 
0 
0 
26.. 
25 
25 
15 “ 
33 
33 
5 “ 
0 
0 
27.. 
67 
33 > 34 
16.. 
3 1 
3 i 
6.. 
0 
0 
28.. 
0 
0 
17.. 
34 
34 
7 “ 
0 
0 
29.. 
40 
40 
18.. 
25 
25 
8.. 
4 
4 
30 “ 
42 
42 
19.. 
0 
0 
_ 3 i“ 
48 
12,12,24 
20.. 
8 
8 
Total.. 
1,301 
June 1 .. 
32 
32 
21.. 
12 
12 
2. . 
43 
43 
22.. 
*9 
19 
1 The male died on June 25, the female on July 27. Temperatures: Maximum, 98° F.; minimum, 43 0 
average, 72 
Eggs which were deposited on May 4 hatched on May 12, and the 
larvae (PI. LXIII, fig. 2) fed ravenously until May 28, when they entered 
the ground to a depth of about 3 inches and transformed to pupae on 
May 30. Adults emerged on June 9. 
Eggs which were deposited on May 7 hatched on May 16. The larvae 
became full grown, pupated on May 31, and entered the soil, from which 
the adults issued on June 10. 
SECOND GENERATION 
After the adults of the first generation had issued from the ground, 
three p'airs were isolated while in copulation and placed in jars with 
potato leaves as food on June 17, 18, and 19, respectively. 
