37 
One of Professor Gillette's correspondents reports thut he tound 53 
larva' under 295 bands in two weeks. Another reports 307 larva3 
April 2 and -1:09 April IT from 2,500 hands. Gillette tliinks that the 
number caught under these bands is too small to be of any great 
value as a remedial measure. 
DURATION OF THE STAGES IX THE COCOOX. 
On account of the direct influence of this question upon the system 
of banding, particular care was taken to ascertain the duration of the 
cocoon stao^e, and especialh' the minimum time. The older writers 
gave estimates of this time with but little delinite data. Riley gave 
from 15 to 21 davs; Wash])urn, 3 weeks; Slingerland, 2 to 3 weeks, 
and Aldrich a])out 1 week. Professor Gillette gives records of com- 
plete experiments upon this point. In 1900 observations made for 
him upon lol: larvte gave a minimum of 12 days, a maximum of 29 
da3^s, with an average of 20 days. Other experiments directed by the 
same writer in 1901 on 76 larvae resulted in linding the minimum to l)e 
3 da3^s; maximum, 23 days, and average 16f da}^^. In 1900 the 
writer found that in 7 cages the shortest time varied between 12 and 
15 days, with an average minimum of about 14 da3^s. In 19()2 a large 
series of breeding experiments were carried out, the results of which 
are incorporated in the following table: 
Table IY. — Durdtiou of life of the, codling moth inside the cocoon. 
Date of fiitcTiiiK band. 
Number 
of 
larvfe. 
Date 
moths 
emerged. 
1 
Number 
of moths. 
Time. 
Total 
effective 
tempera- 
ture. 
Average 
effective 
tempera- 
ture. 
1902. 
1902. 
Ikti/a. 
°F. 
°F. 
J u n e 29 
IC, 
July 19 
July 21 
2 
2 
■ 20 
22 
433 
iiOo 
21 
2:^ 
Julv 22 
2 
23 
MS 
24 
July 11 
3.5 
July 80 
1 
16 
494 
31 
Julv 31 
4 
17 
528 
31 
Aug. 1 
5 
18 
56G 
31 
Aug. (i 
1 
23 
7-22 
31 
•July 22 
Aug. 9 
•) 
18 
583 
32 
Aug. 11 
i 
20 
W5 
Aug. 29 
1 
38 
1.115 
29 
Sept. 1 
ti 
41 
1,170 
29 
Sept. 5 
2 
4.=> 
1.284 
29 
Sept. 9 
2 
49 
1.392 
28 
J 111 y 29 
Aug. 9 
Aug. 11 
3 
11 
3C.2 
33 
3 
13 
121 
33 
Aug. 12 
3 
H 
LV-. 
32 
Aug. 13 
(■) 
ir> 
4S1 
32 
Aug. ir> 
5 
17 
•Vll 
32 
Aug. It; 
2 
IS 
."SiU") 
31 
Aug. 18 
."i 
20 
600 
SO 
Aug. 19 
•> 
21 
til 5 
29 
Aug. 20 
1 
2-2 
tU^^ 
29 
Aug. 21 
5 
tu;i 
29 
Aug. 22 

21 
ti93 
29 
Aug. 2f> 
2 
27 
7S3 
29 
Sept. 9 
1 
h 
1,171 
28 
July ;u 
11 
Aug. IS 
2 
IS 
5;i5 
30 
Aug. 19 
1 
19 
550 
29 
Aug. 20 
1 
20 
553 
2S 
Aug. 21 
1 
21 
581 
28 
Aug. 23 
3 
23 
Wl 
28 
Aug. (J 
VUiT. IS 
1 
12 
209 
17 
Auir. 19 
1 
13 
•224 
17 
Auir. 21 
3 
l'^ 
270 
IS 
Aujr. 22 
4 
ir. 
302 
19 
Aug. 23 
3 
17 
;wo 
19 
