40 Indian Forest Records. [Vol. VII. 
Table 15. —Length of the Pupal Stage of the Second Generation , 1914. 
Individual Serial Number. 
Date of 
Pupation. 
Date of 
Emergence. 
Length of Pupal 
Period in days. 
1 
May— 
3rd . 
May— 
19th 
15 
2 
10th . 
27th . 
16 
3 
18th 
June— 
3rd 
15 
4 
20th 
5th 
15 
5 
25th 
11th 
16 
6 
June— 
2nd . 
18th 
15 
7 
5th 
19th 
13 
The above records indicate that pupation commences as early as 
the 3rd of May, and continues until the 5th of June. The shortest length 
of the pupal period is 13 days and the longest 16 days ; the average 
length on 7 observations is 15 days. 
1915. During the season of 1915, more material was available for 
the experimental determination of the pupal period of this generation. 
Mature larvae were obtained by trapping in sack-bands during the 
month of May. The table immediately following shows the data recorded 
for 50 individuals selected from the sack-band material. 
Table 16. — Length of the Pupal Stage of the Second Generation , 1915. 
Individual 
Serial 
Number. 
Date 
of 
Pupation. 
Date 
of 
Emergence. 
Individual 
Serial 
Number. 
Date 
of 
Pupation. 
Date 
of 
Emergence. 
May— 
Mav— 
May— 
May— 
1 
14th 
26th. 
28 
14th 
27th. 
2 
17th 18 th 
29th 30th. 
29 
20th 
31st. 
3 
14th 
26th 
30 
12th 
24th. 
4 
16th 
27th. 
31 
14th 
27th. 
5 
16th 
28th. 
32 
14th 
26th. 
6 
16th 
28th. 
33 
14th 
28th. 
7 
14th 
27th. 
34 
16th 
27th 
8 
16th 
28th. 
35 
20th 
1st June. 
9 
14th 
26th. 
Mav— 
10 
17 th 18th 
29th. 
36 
14th 
26th. 
11 
17 th 
29th. 
37 
16th 
20th. 
12 
14th 
26th. 
June— 
13 
14th 
26th. 
38 
20th 
2nd 
14 
14th 
■ 26th. 
39 
14th 
26th May. 
15 
14th 
! 26th 
40 
16 th 
29th. 
16 
14 th 
26th 
41 
17tb 18th 
1st June. 
17 
14th . I 
27th 
42 
20th . I 
1st. 
18 
14th . 1 
26th 
43 
17 th, 18 th. 
31st May. 
19 
14t 'n . | 
28th. 
44 
20th . 1 
3rd June 
[ 185 ] 
