Men mt 
ae te a ks, 
DINODERUS PILIFRONS. 171 

(2) Any beetles and larve that may be at work in them will 
be drowned. 
(3) It is considered that the water dissolves out much of 
the nutritive matter in the wood cells, upon which 
the borers and their larve feed. 
2. In thinning bamboo clumps in the systematic manner now 
carried out in parts of India, the contractor should be made to 
remove, as far as possible, the larger refuse from the cut-over 
clumps. It is usual to remove only the straight pieces of any 
one bamboo cut out, these alone having a marketable value. 
The rest is left lying 2 s¢tu. The thin branchwood stuff would 
probably be too expensive to either remove or burn, but the 
thicker rejected tops and ends should be cleared out of the 
forest. If they are thrown into the nearest stream it will 
suffice. It is more than probable that the systematic working of 
the bamboo clumps, whereby the formerly large amount of dead 
and dying bamboos in the forest, which always provided a suffi- 
ciency of food for the beetle, is disappearing, will bring the pest 
into prominence, by localising it in centres and thus rendering 
it dangerous, if the larger refuse is left round the thinned 
clumps in the coupes. 
3. Cut bamboos in the cold weather months, preferably 
between December and the end of February, since there is the 
greater probability of the borers being in the hiberhating stage 
of their life history during these months, 
Points tn the life history requiring further observation. 
1, The number of yererations of the insect in the year, 
2. Length of time spent in the larval and pupal stages of 
the insect in the various generations, 
3. What other trees are attacked by this Dinoderus ? 
