Excerpt from Insects, Injurious and Beneficial: Their Natural History and Classification
This book is intended as an elementary text-book of Entomology. Up to the present time but little attention has been given to the study of the Natural History of Insects, even by those who cultivate the soil; and the chief aim of this book is to introduce the subject in plain language and concise form, acquainting the student with the four states or stages of insect life, the transformations of insects, and the division or classification of insects into Orders and Families.
The plan of fully illustrating the work is adopted in order to make object-teaching available to some extent; also, to aid the student in classifying the more common insects into Orders and families.
As a rule which has but few exceptions, insects that belong to the same family have similar habits; so that, by knowing to what Family any insect belongs, we may tell whether to regard it as an injurious or a beneficial insect, because agreeing in its habits with other insects belonging to the same Family.
The description given of their transformations applies equally to injurious, beneficial, and innoxious insects; but the illustrations mostly represent those which are either injurious or beneficial, so as to give the student a correct idea of the appearance of members of these two classes of insects which more directly interest the cultivators of the soil.
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