62 
BTLLETIX 903, U. S. DEPARTMENT OF AGRICULTURE. 
Table XIII. — Incubation and development of radieicole of the grape phylloxera 
on living vines, Walnut Creek, Calif., 1913-1915 — Continued. 
SIXTH GENERATION, 1914. 
Indi- 
vidual 
No. 
Date 
egg de- 
posited. 
Da r e 
egg 
hatched. 
Incuba- 
tion 
period. 
Date 
insect 
matured. 
Growing 
period. 
Total 
period of 
develop- 
ment. 
Varietv of vine and A^i 3 ^ 
number of cage. fe" 
1 
May 29 
June 2 
June 9 
...do 
June 7 
June 8 
June 19 
Days. 
9 
6 
10 
June 24 
Julv i 
Days. 
17 
23 
Davs. 
29 
c F. 
"Muscat TXA . *; 
2 
Grenache TLA 
? 
Julv 10 21 31 
Muscat TXA 69 
4 
June 20 
11 
Julv 26 
r E 
47 
. do 69 
SEVENTH 
GENERATION, 1914. 
1 
June 24 
...do 
June 25 
...:•: 
June 26 
...do 
Julv 1 
Julv 2 
...do 
Julv 3 
...do 
Julv 3 
Julv 4 
Julv 3 
Julv 4 
...do 
...do 
Julv 9 
Julv 11 
...do 
...do 
- d0 
9 
10 
8 
9 
S 
s 
8 
9 
9 
> 
v 
Julv 23 
Julv 29 
Julv 23 
Julv 30 
July 2S 
Julv 30 
July 29 
...do 
Aue. 1 
Aug. 3 
...do 
20 
25 
20 
26 
24 
26 
20 
IS 
21 
23 
23 
- 
35 
28 
35 
32 
34 
28 
27 
30 
31 
31 
Muscat IXA 
70 
2 
3 
do 
do 
71 
70 
4 
do 
do 
71 
71 
6 
do 
Grpnanhp. TT A 
71 
72 
a 
do 
72 
9 
10 
11 
do 
do 
do 
72 
72 
72 
ilGHTH GENERATION, 1914-15. 
1 
Aug. 17 
...do 
a--. :i 
...do 
- 
23 
23 
30 
30 
Muscat XXX. . 
70 
2 
do 
70 
3 
...do 
A.:;. .: 
S 
Sept, 26 
32 
40 
do 
69 
4 
...do 
...do 
5 
Mar. 26 
213 
221 
do 
3 72 

...do 
...do 
> 
Mar. 30 
217 
225 
do 
3 72 
6 
...do 
...do 
> 
Anr. 3 
221 
229 
do 
3 72 
7 
...do 
...do 
S 
Apr. 4 
222 
230 
do 
3 72 
> 
...do 
...do 
S 
(<) 
do 
3 72 
9 
...do 
Aug. 26 
9 
C<) 
do 
3 J2 
NINTH GENERATION, 1914-15 
1 
. Se JL: 6 . 
Sep! 27 
...do 
I'- 
ll 
(*) 
Muscat XJX 
»72 
2 
Apr. 11 j 196 
207 
do 
NINTH GENERATION. 191; 
1 
Mar. 31 Apr. 19 
19 
Mav 22 
33 
": Cariman XXIX 
57 
: 
...do '..do 
19 
Mav 23 
34 
53 do 
57 
3 
...do ...do 
19 
Mav 24 
35 
54 do 
0.- 
4 ...do do 
19 
May :: 
36 
55 do 
57 
TENTH CrENERATION, 1915. 
1 Mav 23 June 3 
".•- 
2 May 27 June 6 
: 
June 24 
Julv 1 
32 Carisnan XXIX. . 
3-5 Zinlandel XXTTTA 
ELEVENTH GENERATION. 1915. 
1 Julv 9 Julv 15 
2 1 " 
6 
Aus. 10 
July 29 
...do 
26 
32 Zinlandel XXTTT A 
fisrignan XXTX 
73 
3 
.do 
TWELFTH GENERATION. 1915. 
1 
2 
3 
4 
Aug. 2 
...do 
...do 
Aug. 4 
Aug. 16 
...do 
Aug. 17 
Aug. IS 
Aug. 19 
Aug. 9 
Aue. 10 
Aug. 9 
a - :: 
Aug. 24 
Aug. 25 
...do 
Aug. 27 
...do 
S 
7 
7 
S 
9 
S 
9 
S 
Sept. - 
Sept. 9 
Sept. 10 
30 
32 
30 
3S 
39 
37 
Zinlandel XXXVI 
do 
do 
do 
72 
Zmffi-ndel NNTTT A 
6 
7 
.do 
v 
do 
9 
. .do 
remperature of incubation period alone- 
Died, 1915. 
