bject of their search. And
that this would appear to be the true solution, no one who has
witnessed the grand spectacle of the 'Kentish Glories' or the
'Emperor' moths coming up against the wind can, I should say, for a
moment doubt.

"To be attractive the female must be in that condition which is known
by the fraternity as 'calling,' that is, she should be slightly
convulsed with tremor, and the last segment of the body should be
denuded of fur. Then, if the weather be propitious--bright for such
males as fly in the sunshine, warm at dusk for those whose hour of
flight commences with the shades of evening--and if also the wind be
blowing steadily from a favourable quarter, such as west, south, or a
gentle south-west, we may reasonably hope for success.

"But the young collector must remember that it does not by any means
follow that because he captures a female, say an 'Oak eggar,' on the
wing in the evening, he has detected the time of flight of the males.
In fact, it very frequently happens that the males fly in the daytime
and the females in the evening.

"In the case of species which inhabit open parts of the country, such
as moors, mosses, commons, chases, fens, and fields, we should take
care that no obstacle is in the way to prevent the current of air from
carrying the scent freely over the locality. On the other hand, if it
be the inmates of a wood or copse which we are desirous of attracting,
we must either select a ride down which the wind finds its way, or
else we shall have to allow the breeze to convey the scent from some
part of the surrounding country to the outskirts of the wood.

"As a rule, it is quite sufficient for our ends to lay the baited cage
upon the ground, and then to lie down at a little distance off and
keep watch. But in some cases it is advisable to tie the cage to the
trunk or branch of a tree, or to fix it in a bush. I have found the
latter very effective with the red-belted apple clearwing (Sesia
myopiformis), and no doubt it would also prove so with other species
of the class.

"Any Londoner who would like to judge for himself can easily manage
it. He has only, in the first place, to hunt about in his own or some
one else's garden for a handsome little caterpillar, of a blackish
colour, spotted with pink, with four rows of thick tufts of yellowish
hairs resembling brushes upon its back, with two long tufts of
blackish hairs pointing forwards in front, almost like horns, and a
s