WALNUT APHIDES IN CALIFORNIA. 
11 
Table IV. — Life cycle of the summer generations of Chromaphis juglandicola, San Jose, 
Cal, 1911. 
Generation No. 
No. indi- 
vidual. 
Date of— 
Life 
cycle. 
Form of indi- 
vidual. 
Deposi- 
tion. 
Reach- 
ing adult 
state. 
Days. 
f 1 
Juoe 8 
June 28 
20 
Viviparous. 
2 
16 
July 1 
15 
3 
16 
1 
15 
Do! 
IV 
4 
5 
16 
16 
1 
2 
15 
16 
Do. 
Do. 
6 
16 
2 
16 
Do. 
7 
16 
2 
16 
Do. 
1 
July 1 
15 
14 
Do. 
V 
2 
3 
1 
1 
15 
17 
14 
16 
Do. 
Do. 
4 
1 
18 
17 
Do. 
1 
15 
31 
16 
Do. 
2 
15 
31 
16 
Do. 
3 
15 
31 
16 
Do. 
4 
15 
31 
16 
Do. 
5 
15 
31 
16 
Do. 
6 
15 
31 
16 
Do. 
7 
15 
31 
16 
Do. 
8 
16 
Aug. 1 
16 
Do. 
9 
16 
1 
16 
Do. 
10 
16 
1 
16 
Do. - 
VI 
11 
12 
16 
16 
2 
2 
17 
17 
Do. 
Do. 
13 
16 
2 
17 
Do. 
14 
16 
2 
17 
Do. 
15 
17 
2 
16 
Do. 
16 
17 
2 
16 
Do. 
17 
17 
2 
16 
Do. 
18 
17 
3 
17 
Do. 
19 
17 
4 
18 
Do. 
20 
18 
5 
18 
Do. 
21 
18 
6 
19 
Do. 
22 
18 
6 
19 
Do. 
1 
Aug. 2 
17 
15 
Do. 
2 
2 
17 
15 
Do. 
VII 
3 
2 
17 
15 
Do. 
4 
2 
19 
17 
Do. 
5 
3 
20 
17 
Do. 
6 
3 
20 
17 
Do. 
7 
3 
20 
17 
Do. 
f 1 
IS 
Sept. 1 
14 
Do. 
2 
19 
2 
14 
Oviparous. 
3 
19 
2 
14 
4 
19 
3 
15 
Do! 
5 
19 
3 
15 
Do. 
6 
19 
3 
15 
Do. 
7 
19 
3 
15 
Do. 
8 
19 
3 
15 
Do. 
VIII 
9 
10 
19 
20 
3 
4 
15 
15 
Do. 
Do. 
11 
20 
4 
15 
Do. 
12 
20 
4 
15 
Do. 
13 
20 
6 
17 
Viviparous. 
14 
20 
6 
17 
Oviparous. 
15 
20 
6 
17 
16 
20 
7 
18 
Viviparous. 
1 
Sept. 5 
30 
25 
Oviparous. 
2 
5 
Oct. 1 
26 
3 
5 
6 
31 
Viviparous. 
4 
5 
6 
31 
Do. 
5 
5 
8 
33 
Do. 
6 
5 
8 
33 
Do. 
7 
7 
9 
32 
Do. 
IX 
8 
9 
7 
7 
11 
13 
34 
36 
Do. 
Do. 
10 
7 
14 
37 
Do. 
11 
7 
14 
37 
Do. 
12 
8 
12 
34 
Do. 
13 
8 
17 
39 
Do. 
1 14 
8 
17 
39 
Do. 
