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much to the disgust of the ladies of the household. The 
bugs are decidedly stupid; at least they can not be scared 
away, but have to be forcibly ejected. This habit of crowd 
ing into dwellings has been the cause of many complaints. _ 
The life-history of this box-elder bug is told in a few words: 
here in Minnesota it infests only the box-elder, not having 
as yet been found injurious to other trees. The bugs, being 
sucking iusects, insert the organs of suction, which are 
inclosed in their beaks, into the tissue of the leaves, always 
choosing their underside. Here they live in plenty, under- 
going all their changes from a young larva to the adult insect, 
until the supply of liquid sap flows more and more slowly, when 
they are forced to leave, as has already been mentioned. Fre 
quently eggs are found early in the spring upon all sorts of things 
stored away in our out-houses. This should not cause such a 
fear aS was expressed in a letter, in which the writer asked 
whether the insects resulting from such eggs would injure his 
new selfbinder, as that machine had been covered with eggs. 
Most of the young bugs hatched from eggs deposited in such 
situations will die before reaching a suitable tree. 
To kill these bugs is not an easy matter, as they can not be 
poisoned like insects with a biting or chewing mouth. To kill 
them at all would require a powerful spraying machine, by 
means of which the entire tree could be thoroughly sprayed. 
Such a machine is not found in the possession of people hav- 
ing only a dozen or so of shade-trees in front of their houses, 
nor could we expect this. But as the cities and villages are 
interested in good and healthy shade-trees in their streets and 
parks, the authorities should buy sufficient good spraying out- 
fits, and should engage men to use them frequently and intelli- 
gently, not alone against the box-elder bug, however, but 
against all insects infesting our shade-trees. During the 
warmer parts of the season most of the shade-trees are in a 
decidedly bad condition, owing to all sorts of insects, but 
chiefly to leaf-lice of various kinds. A forcible spraying, even 
with pure water alone, would be a wonderful blessing to such 
dusty and bug infested trees, while repeated spraying with 
kerosene-emulsion would soon transform these neglected and 
unsightly trees into things of joy and beauty. Under the head 
of leaf-lice formulas are given for kerosene emulsion. Farmers 
