INSECTS INJURIOUS TO FOREST AND SHADE TREES. 
INTRODUCTION. 
The design of this bulletin is to give to the public, especially those 
persons interested in forestry and the planting and cultivation of shade 
trees, a brief summary of what is up to this time known of the habits 
and appearance of such insects as are injurious to the more useful kinds 
of trees. It is hoped that such a compendium will be found useful, and 
lead the reader not only to refer to the works of Harris, Fitch, Walsh, 
Riley, Le Conte, Horn, LeBaron, Saunders, and others of our entomolo- 
gists who have contributed to this neglected branch, but induce him to 
make careful observations on the habits of destructive forest insects and 
to carry on experiments as to the best remedies against their insidious 
attacks. The writer has added some notes of occasional observations 
made during the past twenty years in the forests of Maine and the 
woods of Massachusetts, as well as in Colorado, Utah, Montana, and 
on the Pacific coast, with a few original engravings; but the aim has 
been not so much to present original matter as to bring together from 
numerous entomological works, reports and journals and to present in 
a summary way, all that is of most importance to the practical man, 
It will be seen that really our knowledge of the subject is very scanty, 
and that the pamphlet is largely a simple list of the insects which live 
upon our more important forest trees. But the work may serve as a 
convenient synopsis, a starting-point, or handy book of reference for the 
use of future observers, and it is hoped that it will call the attention of 
the public to a neglected subject and stimulate entomologists and 
practical foresters and gardeners to do what they can to add to our 
knowledge of this department of applied or economic entomology. 
The preservation of our forests and of old and valued shade trees in 
our cities and towns is a subject of pressing importance, and it is to be 
hoped that the government will foster private work and research in this 
direction. Next to the wanton destruction of forests by unthinking 
settlers and shiftless farmers, as well as fires caused by the sparks of 
locomotives, the attacks of injurious insects are most widespread and 
far reaching.» Our forest and shade trees are yearly growing more 
valuable and indispensable, and at the same time the ravages of in- 
sects are becoming more widespread and noticeable. The diffusion of 
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