32 
Indian Forest Records. 
[Vol. VII. 
It is evident that the sack-bands were put out far too late to obtain 
more than the latest swarms of this generation, and that on a few trees 
only was more than a very small proportion of the caterpillars caught. 
Out of the 335 trees banded, 163 trees failed to produce any larvae or 
cocoon. If the figures are arranged slightly differently, this is still more 
evident, i.e .— 
Time when banded. 
Average number caught 
per tree. 
May— 
12th . 
218 
15th . 
7 
18th . 
7 
19th . 
9 
20th . 
8 
22nd . 
2 
24th . 
1*5 
25th 
1-2 
26th . 
•4 
27th . 
•4 
28th . 
•2 
June 
• 
•0 
It is now clear that the earliest bands were put out two to three weeks 
too late, and that to ensure catching the first individuals of the second 
generation, bands should be on the trees prior to the 15th April. 
1916. In 1916 it was resolved, in consequence of the experience 
of the previous year, to determine the seasonal activity of the mature 
larvae of both the first, or flower, and the second, or fruit, generations, 
by continuous sack-band records throughout the hot weather. Owing 
to unforeseen difficulties in the supply of labour and opposition on the 
part of the owners of toon trees, the sack—banding was unavoidably 
delayed in some localities beyond the commencement of the swarming 
season of the first generation larvae. The data obtained, however, are 
relatively complete and permit of judicious interpretation. In all, 898 
toon trees were banded over an area of some 3 square miles. Records 
were kept separately for localities, viz. :—Locality I, 100 trees banded 
on the 13th and 14th March ; Locality II, 538 trees banded on the 
15th—18th and 21st March ; Locality III, 225 trees, banded on the 
9th and 12th April; Locality IV, 35 trees banded on the 9th April. 
The trees were serially numbered and visited daily (with a few 
exceptions) during April and May 1916 by parties consisting each of 
one trained collector and one or two coolies. The larvae and cocoons 
collected on each tree were counted on the spot, and brought in sealed 
[ 177-] 
