60 
Indian Forest Records. 
[Vol. vii. 
The lengths of the larval stages summarized from 
are :— 
the data above 
Average number of days in the first stadium 
,, „ „ „ second stadium 
,, „ ,, „ third stadium . 
„ „ „ ,, fourth stadium . 
= 4-8 Pins. 
- 8-8 
- 14-2 
-=105*2 
The absolute length of the first larval stadium is not determinable since 
the individuals used were several days old on the date of inoculation. 
The following statement shows the lengths of the larval periods 
in 5 cases. 
Table 33 .—Length of the Larval Period of the 5th Generation, 1915-1916. 
Individual Number. 
Date of 
Total number of 
days. 
Inoculation. 
Pupation. 
October— 
February— 
1 
12th 
23rd 
134 
2 
12 th 
19th . 
130 
3 
19th 
26th . 
130+ 
4 
19th 
24th 
1284- 
5 
26th . 
16th 
143+ 
With a deduction of 1—2 days spent in constructing the cocoon it 
is estimated that the average larval period (feeding 'plus hibernation) 
occupies 132 days. The absolute feeding period has not been deter¬ 
mined ; it is presumably somewhat longer than that of the 4th generation. 
Pupae of the Fifth Generation- 
The occurrence of fifth brood pupae has already been noted in the 
previous records of the field work carried out on this generation. 
1914 . The length of the pupal period was determined in 1913-14 
from the following observations :— 
Table 34. — Length of the Pupal Period of the 5th Generation, 1913- 
1914. 
Individual* 
Number. 
Date of Collec¬ 
tion of shoots. 
Date of 
Pupation. 
Date of 
Emergence. 
Total number 
of days. 
1 
Dec. 1913— 
20th 
March 1914— 
5th 
March 1915— 
19th 
14 
2 
20th 
5th 
22nd March 1914 
17 
3 
22nd . 
12th 
24th „ 
12 
4 
22nd . 
24th 
6th April „ 
12 
5 
27t.h February 
28th February 
28th February „ 
14 
6 
1914. 
4th March 1914 
7 th March 
22nd March „ ! 
15 
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