144. LASIOCAMPIDS. 
moved. This is at least quite easily done in our or- 
chards, but when it comes to destroying such eggs on forest 
trees this is not an easy matter, though nearly all egg- 
masses will be found concentrated upon the twigs of linden. 
In case of the Orchard Tree tent-caterpillars the white tents 
made by them are readily detected, and they should be de- 
stroyed as soon as possible. This should be done when the 
caterpillars are at home,i.e. early inthe morning or towards 
evening; during the middle of the forenoon and in the after- 
noon they are away from their nests and are engaged in 
feeding. As long as the tents are small and can be reached 
they and their entire contents should be crushed with the 
hand protected by a glove or mitten. If they can not be 
reached in this way the caterpillars can be destroyed by 
thrusting a rag soaked with kerosene and fastened toa pole, 
into the tent and by twisting the pole all worms will come 
in contact with the oil, which will killthem. Burning torches 
applied when the tent is occupied will also kill the worms 
but the flameis apt toinjure thetrees. Of course united action 
is necessary, for if a single orchard is neglected and permit- 
ted to become a breeding-place not alone of the tent-cater- 
pillars but of many other kinds of noxious insects, it 1s suf- 
ficient to stock and restock all neighboring orchards. If all 
fruit growers in any given region would destroy allthe tents 
on their trees, even for a single season, the work of destroy- 
ing the caterpillars in the following year would be greatly 
lessened. In fact it would well pay to offer a small bounty to 
children for collecting eggs or the small nests still containing 
the worms. It should be remembered that each ring of 
eggs, and each small tent, contains from 300 to 400 minute 
caterpillars which if permitted to grow can cause great in- 
jury. 
One of the best remedies is the use of Paris-green sprayed 
upon the foliage of the infested trees. The writer has made 
numerous experiments with this substance, and has found 
that the large caterpillars are as readily killed as those just 
