at
intervals of not more than three months, to ensure the killing of
parasites that destroy the specimens.

Entomological supplies may be obtained from Chapman & Co., London, Ont.,
or from G. M. Hendry Co., Toronto, Ont., or from Messrs. Watters Bros.,
Guelph, Ont.

BUTTERFLY AND MOTH COLLECTIONS

For a study of the metamorphosis of butterflies and moths, it is
necessary to have an insect cage. This can be purchased from any dealer
in entomological supplies or it may be made by the pupils in the Manual
Training Class. See Manual on _Manual Training_. A very satisfactory
cage may be made, by the teacher or larger pupils, from a soap box, by
tacking wire gauze over the open surface of the box, removing the nails
from one of the boards of the bottom, and converting this board into a
door by attaching it in its former position by light hinges and a hook
and staple. The box, if now placed on end with two inches of loose soil
in the bottom, will constitute a satisfactory insect cage, or vivarium.

A large lamp chimney with gauze tied over the upper end is useful for
inclosing a small plant upon which eggs or insect larvae are developing.
The base of the chimney may be thrust an inch into the soil and the
development of the larva as it feeds upon the growing plant can be
studied.

The following are larvae suitable for study and may be found in the
places named:

The tomato worm on tomato or tobacco plants. (Look for stems whose
leaves have been stripped off.)

The milkweed butterfly larvae on milkweed,

The potato beetle on potato vines,

The eastern swallow-tail butterfly on parsnip or carrot plants,

The tussock-moth on horse-chestnuts,

The promothea moth on lilac bushes,

The cabbage-butterfly on cabbage or mustard plants,

The red-spotted purple, banded purple, and viceroy butterfly larvae on
willow and alder,

Cocoons of tussock-moth and tiger-moth under bark, logs, and rubbish in
early autumn.

Larvae of the emperor-moth (cecropia) may be found wandering about,
apparently aimlessly, in September; but they are searching for suitable
places for attaching their cocoons to orchard and forest trees.

After the leaves have fallen from shrubs and trees, cocoons can be found
more easily on the naked twigs or in withered, rolled-up leaves that are
fastened by the silk of the cocoon to the branches.

Larvae, when placed in the cage, should be supplied with green plant food
such as they were found feeding up