INSECTS. 
83 
of water. Particular directions, drawn up by Mr. Haggerston himself, 
for the preparation and use of this simple and cheap application, may 
be found in the “ Boston Courier,” for the twenty-fifth of June, 1841, 
and also in mos of our agricultural and horticultural journals of the 
same time. The utility of this mixture has already been repeatedly 
mentioned in my treatise, and it may be applied in other cases with 
advantage. Mr. Haggerston finds that it effectually destroys many 
kinds of insects ; and he particularly mentions plant lice of various 
kinds, red spiders, canker worms, and a little jumping insect which 
has lately been found quite as hurtful to rose bushes as the slugs or 
young of the saw fly. The little insect alluded to has been mistaken 
for a species of thrips, or vine fretter; it is, however, a leaf hopper, or 
species of Tettigonia , much smaller than the leaf hopper of the grape 
vine, (Tettigonia vitis ,) and, like the leaf hopper of the bean, entirely 
of a pale-green color. 
In treating of the common Rose Bug, or Rose Chafer, (Melolontha 
subspinosa]) Dr. Harris says:— 
The natural history of the rose chafer, one of the greatest scourges 
with which our gardens and nurseries have been afflicted, was for a 
long time involved in mystery, but is at last fully cleared up. The 
prevalence of this insect on the Rose, and its annual appearance coin¬ 
ciding with the blossoming of that flower, have gained for it the pop¬ 
ular name by which it is here known. For some time after they were 
first noticed, rose bugs appeared to be confined to their favorite, the 
blossoms of the rose; but within thirty years, they have prodigiously 
increased in number, have attacked at random various kinds of plants 
in swarms, and have become notorious for their extensive and deplo¬ 
rable ravages. The grape vine in particular, the cherry, plum and 
apple trees, have annually suffered by their depredations ; many other 
fruit trees and shrubs, garden vegetables and corn, and even the trees 
of the forest and the grass of the fields, have been laid under contri¬ 
bution by these indiscriminate feeders, by which leaves/flowers, and 
fruits are alike consumed. 
The unexpected arrival of these insects in swarms, at their first 
coming, and their sudden disappearance, at the close of their career, 
are remarkable facts in their history. They come forth from the 
