THE BOX-ELDER LEAF-ROLLER IN 1896. 31 
safest way, however, is to destroy their homes, not our 
houses, but the shelters in them that they prefer to occupy. 
The brick pavement under stoves should be laid in such a 
manner that the insects can not force their way underneath 
which they are so well enabled to do, their legs being formed 
for digging. All the cracks should be hermetically sealed, 
and especial attention should be paid to the foot-boards 
which, as a general rule, do not fit tightly against the walls. 
The space between them and the walls should be filled in and 
a close fit should be made by means of putty. By taking 
away their breeding-places and homes we soon force them to 
leave our houses; they are very apt, however, to migrate to 
more hospitable people. 
The illustration (fig. 18) shows the adult insects as well 
as a young cricket. The insect is of a light leather-brown 
color and marked with darker brown spots upon the head 
andtwotriangular brown spots and a band upon the thorax. 
Head and legs are lighter colored. As can be seen the male 
is distinguished by the musical instrument it carries on its 
back while the female possesses a long ovipositor. 
THE BOX-ELDER LEAF-ROLLER IN 1896. 
(Cacaecia semiferana Walk.). 
These leafrollers (illustrated on plate XV) which caused 
so much damage to box-elder trees in St. Paul in 1895, could 
again be found in considerable numbers during theearly part 
of the year, but as the rainy weather in spring and early 
summer was decidedly to their disadvantage and to the ben- 
efit of the trees no very serious damage was done. Many 
of the trees were attacked, but the foliage had obtained an 
early start and as the worms were forced to eat wet foliage 
they grew but slowly. Still, if the parasites in 1895 had not 
greatly reduced the numbers of these worms most trees would 
again have been denuded. 
Some experiments with Paris green were carried on to 
demonstrate the value of this poison against the insect in 
question and experiments with ‘“‘Raupenleim’’ (caterpillar- 
glue) were also made to test its value against insects of this 
nature. 
