Part VII] Beeson; Life History of Toon Borer . 
2d 
Pupae of the first generation. 
1915. A few records, obtained in 1915, of the length of the pupal 
stage of the first generation, are given below. 
Table 5. —Length of Pupal Stage of First Generation , 1915. 
Number of Individuals. 
Date of 
Pupation. 
Date of 
Emergence. 
Length of pupal 
period in days. 
1 
29th April 
10th May 
11 
4 
30th „ 
11th „ 
11 
4 
5th May 
17th „ 
12 
The average length of the pupal period is therefore 11*5 days. As 
regards field conditions, records show that on 29th April, live pupae and 
empty cocoons were found underneath the bark of old trees and a few 
mature larvae were also observed wandering on the trunks. Larvae and 
pupae were collected at irregular intervals from the above date until the 
the 6th May. The majority of the cocoons obtained (over 2,000) con¬ 
tained empty pupal skins. 
1916. In 1916 larvae were bred up in the insectary and mature 
individuals were collected plentifully under sack-bands. The following 
table shows the dates of pupation and moth emergence of 47 individuals 
of the first generation. 
Table 6. —Length of the Pupal Stage of First Generation , 1916. 
Individual Serial Number. 
Date of 
Pupation. 
Date of 
Emergence. 
Length of Pupal 
period in days. 
April— 
April— 
1 
8th 
18th 
10 
2 
8th 
29th 
11 
3 
13th . 
25th . 
12 
4 
12th . 
23rd . 
11 
5 
13th . 
23rd 
10 
6 
13th 
23rcL 
10 
7 
11th 
21st 
10 
8 
14th . 
25th 
11 
9 
17th . 
29th . 
12 
10 
17th 
28th 
11 
11 
17th 
28th 
11 
12 
15th 
25th . 
10 
13 
19th 
30th . 
11 
14 
20th 
30th . 
10 
15 
20th 
28th . 
8 
May— 
16 
22nd . 
2nd 
11 
17 
, 24th 
3rd . 
10 
18 
22nd . 
1st 
10 
19 
23rd 
4th 
12 
20 
22nd . 
2nd . 
11 
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