5 
clone it, and thus are trnstworthily led on onr search for 
the cause. We work on a solid and secure basis, with¬ 
out losing time, and our subject lies in our hand ; hut it 
Apple injured by caterpillar uf Codliii IMotb. 
is worse than useless, it is disheartening and confusing, 
to begin by endeavouring to take up what is not true 
entomology, what is not the knowledge of insects, hut 
only the knowledge of their scientific names. We may 
turn, with the help of the index, to the accounts of the 
attacks that are given in the farm insects of John Curtis, 
and in our leading journals on farm, or garden, or forest 
management, or other works, and, guided by the descrip¬ 
tion of the injury, may commonly be led on to the insect 
causer, and, if further help is needed, let us apply in 
each special case to those who devote their time to the 
stud}^ to give us the exact name of the insect; here 
there is no difficulty on that head. The thing that we 
need is the power of knowing 1st,—whether the creature 
under examination is an insect in some one or other of 
the three stages of its existence ; and, 2ndly, to be able to 
tell generally what kind of insect it is,—that is, whether 
it is some state of moth, beetle, fiy, &c., or other main 
division of insect-life; then, with the help of the 
descriptions of the chief forms of attack to whatever 
crop or tree we may wish to refer to, we shall have 
