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By reviewing the preceding pages, we shall find that 

 a preventive used for one kind of insect, will serve to keep 

 others in subjection. 



A little time and attention given to the insects infesting 

 the shade trees will increase the vigor and healthfulness, 

 and more than repay the owner by the beauty and 

 symmetiy of the tree. It is not a pleasant sight to find 

 scattered under the oak trees, branches cut oft' by the Oak- 

 pruner, or whole limbs of trees defoliated by caterpillars. 

 The bark-lice found on the Maple trees in the center of our 

 city, prove the eft'ect of neglect, and if this insect is allowed 

 to increase undisturbed, the trees will be seriously injured 

 unless nature comes to the rescue in the form of para- 

 sites. The most efficient workers we have, are the birds. 

 There is a law existing against discharging fire-arms within 

 the city limits, and if this law was enforced, the eft'ect 

 upon the insects would soon be apparent. 



Mr. John Griswold, on Moss street, has, without doubt, 

 the best collection of trees in the city. The scarcity of 

 insects on his grounds has often caused surprise. The 

 reason is, however, he makes every ettort to protect the 

 birds, by prohibiting guns from being fired anywhere 

 about the premises. Many kinds build their nests in the 

 trees, feeding their young the caterpillars from the tree. 

 While riding over the arsenal at Rock Island, last fall, 

 the webs made by the three kinds of insects previously 

 described, were rarely found, although many were seen 

 from the cars before reaching Rock Island. Upon inquiry, 

 I found that the birds were protected, and for several years 

 have not been disturbed or frightened away. 



Woodpeckers, with their long bills, penetrate the 

 trunks of trees and search out the retreats of the many 

 borers. The number of worms necessary daily for the 

 maintainance of a young brood of birds and their parents, 

 is greater than the casual observer would imagine, and if 

 the birds were protected they would add much to the 

 beauty of our city by their presence and labor. 



