be 
even the bodies of some trees, were completely covered with a 
fine coat of silk, spun by the larve in traveling over the tree. 
Before the middle of July, the moths had all disappeared and 
soon after this the trees produced new foliage. 
A wild cherry tree, close to an infested box-elder, was seen 
to have some of its leaves rolled, and they contained pupal 
skins identical with those on the box-elder. It seems that 
other plants are also to the taste of this leaf-roller, and oaks, 
hickories and all kinds of fruit trees do not escape. In one 
case, currants were growing under a tree infested with these 
caterpillars. Many of them, dropping upon the currants 
below, went to work and folded their leaves as well, and in time 
destroyed their foliage. 
Parasites. Anumber of small Hymenoptera are parasitic upon 
this moth. Plate 9 gives figures of several of these parasites 
bred from the larvze and pup. At least one-half of the pupez, 
collected and placedin cages, proved to be parasitized. It is quite 
likely that these parasites would multiply to such an extent as to 
exterminate the moths, were it not for the fact that the moth 
passes the winter in the egg-stage, thus affording no good 
wintering-place for its parasites. This unfortunate circum- 
stance makes it necessary for the parasites to find other insects 
in which to hibernate, and as such suitable insects are not likely 
to increase in the same proportion as the leaf-roller, many of 
the parasites must fail to survive the cold season. This of course 
seriously interferes with the destruction of these reaf-rollers by 
. their natural enemies. 
The following species of parasites, respectively lettered e, f, 
g, and h, were bred from the leaf-roller: Pimpla inquisitor Say., 
Fig. 52,e; Chalcis flavipes Ash., Fig. 52,f; Dibrachys ( Semiotellus) 
clistocampe Fitch., Fig. 52, g; and Cirrospilus flavicinctus Riley, 
Fig. 52, h. Besides these a small Tachina-fly was bred from a 
larva. 
Artificial Remedies. A thorough spraying with Paris-green 
or London-purple just before the caterpillars commence 
their operations, would kill the great majority and thus 
effectually check the evil. This should be done before 
the leaf-folding process is very far advanced, for after 
the larvee are once inside of their houses they are some- 
what protected. Still as the caterpillars use their houses 
