749 
No. 145.1 
his vicinity the oak and apple tree limbs were breaking off with 
every wind, at the point where they had been operated upon by 
the locusts, and that some of the trees were badly injured hereby. 
The editor of the Farmer, in commenting upon this communica¬ 
tion, thinks that the damage will prove to be but slight, and will 
in reality be that « heading in” which is often serviceable to fruit 
trees. But it must be rare that our apple trees can be benefited 
by any heading in, all experience showing that the perfection of 
the fruit requires that this tree should be kept well trimmed, so 
as to permit a free circulation of air and light among its branches; 
and the same condition of the tree is one of its best safeguards 
against tree-hoppers, plant-lice, and many other insect enemies 
which particularly prefer situations where the foliage is dense. 
In addition to the trees already mentioned, this insect deposits 
its eggs in the poplar, the locust, the hazlenut, and probably in 
all our deciduous trees and shrubs. The different species of wal¬ 
nut and hickory, however, are said to be exempt from its attack. 
It will probably prefer those trees having the twigs thick and ro¬ 
bust, to those in which they are slender and flexile; it has even 
been known, according to Dr. Harris, to commit its eggs to the 
white cfdar, but it is probable that pines and the evergreens 
generally will be avoided by it. 
Dr. Harris, (New England Insects, p. 184,) gives the following 
description of the manner in which the female locust wounds the 
twigs and deposits her eggs. They select those branches and 
twigs which are of a moderate size. These they clasp on both 
sides with their legs, and bending their ovipositor downwards at 
an angle of about forty-five degrees, they repeatedly thrust it 
obliquely into the bark and wood in a longitudinal direction, at 
the same time putting in motion the lateral saws of the ovipositor, 
and in this way detach small splinters of the wood at one end, 
and turn them upwards, so as to form a kind ot lid or cover to 
the perforation. The hole is bored in a slanting direction, to the 
pith, and by a repetition of the same operation, is gradually 
enlarged, forming a longitudinal fissure of sufficient extent to 
receive from ten to twenty eggs. The lateral pieces of the ovi- 
