YPSOLOPAUS SP. 121 

they change into the pupa. The pupal stage lasts about ten 
days, moths of larve taken to Dehra Dun issuing about the 
13th May. 
This much of the life history has been studied up to the 
present. It is almost certain that there will be at least 
one more generation, if not several, of the insect during the 
remainder of the year since the first generation is completed by 
the middle of May, and this point requires further careful observa- 
tion. 
Locality from which the insect has been reported. 
This insect was found by the writer seriously defoliating 
the Sissu (Dalbergia Sissoo) in the Changa Manga plantation 
near Lahore in April r1got. 
Feelations to the Forest. 
The damage is done by the caterpillars who completely or 
partially defoliate the Sissu trees. They appear to prefer the 
older, or it would be more correct to say, the taller trees, and 
were by no means numerous in small coppice. They eat the 
whole of the leaf, or the greater portion of it, leaving generally 
intact the upper epidermis. The Sissu was the chief tree 
attacked, though here and there I saw the webs and found the 
larve on the mulberry and the Acacia modesta. The attack 
had by no means ended when I left the plantation, but even 
then I estimated that 50 per cent., and probably more, of the trees 
were suffering from the caterpillar. Compartments here ang 
there had, however, entirely escaped up to the date of my 
departure. I first noticed and examined it in compartments 72 
and 73. Amongst other it was also more or less severe in com- 
partments 1 and 8 in Block J, 9, 51, 52, 54, 86, 87, 89, and go. 
Protection and Remedies. 
Until more has been ascertained about its life history it 
cannot be said with any certainty that a feasible remedy is 
possible. It should, however, be remembered that such attacks 
always take place on a larger scale in pure forest than in 
a mixed one, as the caterpillars have no difficulty in the former 
of obtaining as much food as they require, and a judicious 
mixture of the Sissu and mulberry would no doubt have the 
