nproductive
tree may be precisely similar to others on which insects swarm. As a
rule, however, rough-barked trees are the best; and smooth, or dead or
rotten ones, the worst. Still there is no hard-and-fast line in this.

Failing trees on which to put your sugar, paint palings, walls,
bushes, leaves of plants, and even flower heads: or, if working on the
seashore, on which several rare and local species are found, "sugar"
flat stones, rocks, or even make bundles of the mat weed, as you will
have to do on the "denes" of Norfolk or similar places, and sugar
them. If you are entirely at a loss for bushes or grasses, soak some
pieces of cloth or calico, before leaving home, in the sugar, and peg
them down on the ground, or stick them in the crevices of the rocks,
if the latter are, from any cause, too wet to hold the sugar.

It often happens that moths will come to sugar, even when not freshly
painted on the trees. I remember once taking several Crimson
Underwings (C. promissa), and several other things, on sugar which was
painted on the trees by a collector four nights before I arrived at
the spot. Butterflies and several other things are often attracted by
sugared trees, whether old or fresh; and Dr. Knaggs says that by day
several butterflies, chiefly Vanessidae, a group comprising the
"Peacock," the "Tortoiseshell," the "Red Admiral," the "Painted Lady,"
and the "Camberwell Beauty," have a penchant for the sugar, and may,
by this means, be enticed within our reach; and the "Purple Emperor"
has thus been frequently entrapped.

Sugaring constantly in the same tract of woodland is certain
ultimately to yield something out of the common, for moths have been
proved to fly many miles in search of natural or artificial sweets,
and even a barren locality may be made exceedingly productive by
perseveringly sugaring it.

Some very curious things come to sugar now and then. Such insects as
beetles, woodlice, slugs, etc, are expected as a matter of course, but
toads, dormice, and bats--all attracted, however, I suspect, as much
by the insects as the sugar--you do not expect, nor the sundry
caterpillars which you occasionally can catch sipping at the sweet
juice. The Hawk moths and Bombyces are popularly supposed not to come,
but I have a distinct recollection of catching, near Woolwich, many
years ago, a "goat moth" certainly "inspecting" the sugar, and
analogous but isolated instances now and then occur.

In the grey of the