Indian Forest Records. 
r»9. 
[Yot. VII. 
which had previously not been recognised as separate periods. Eggs 
were not found on the leaves of the shoots collected daily, until the 
4th September, but previously (particularly between the 14th and 21st 
August) the occurrence of first stage larvae showed that the generation 
had already commenced. Shoots examined between the 8th and 16th 
of September revealed first, second, and third stage robusla larvae, and 
many shoots containing no larvae showed signs of recently abandoned 
borings and feeding patches. From the 18th to the 27th September, 
third and fourth stage larvae were more numerous, but eggs were again 
obtained on leaves as late as the 28th September. From this date 
onwards to the 8th October, pupating larvae and pupae were abundant. 
On the 12th October, a moth was obtained in the act of emerging from 
a shoot. Similar records obtained in 1916 show that all the stages of 
the 4th generation of the borer may be found during the months August, 
September and October. 
Insectary work 1.—As with the larvae of the 3rd generation, inocula¬ 
tion experiments were carried out in the insectary cages to determine 
the feeding period of fourth generation larvae. The method of inocula¬ 
tion and observation was the same in both cases. (vide pp. 45—46.) 
The results are given in table 26 on the next page. 
[ W ] 
