innocents, but without any apparent diminution
in their numbers. Lachaume recommends: "These flies may be destroyed by
placing about a number of pans filled with water to which a few drops of
oil of turpentine have been added. The flies are attracted by the odor
and drown themselves. They may also be caught with a floating light, in
which they will burn their wings and fall into the water." I have found
that pure buhach powder dusted into the air or burned on a hot shovel in
the mushroom house has been more effective in destroying these flies
than either the lamp or drowning process.

=Slugs.=--These are serious pests in the mushroom house, especially in
above-ground structures, and they also occur in annoying numbers in
cellars. Wherever hay or straw is used in covering the beds, or there is
much woodwork about the house, slugs appear to be most numerous. They
are very fond of mushrooms and attack them in all stages, from the tiny
button just emerging from the ground to the fully developed plant. In
the case of the buttons or small mushrooms they usually eat out a piece
on the top or side of the cap, and as the mushroom advances in growth
these wounds spread open and display an ugly scar or disfigurement. They
also bite into the stems. But in the case of fresh, full grown mushrooms
they seem to have a particular liking for the gills, and eat patches
out of them here and there.

="Bullet" or "Shot" Holes.=--My attention was first called to these by
Mr. A. H. Withington, of New Jersey. They are little holes cut clear
through the mushroom caps, as if perforated by a buckshot, and are
evidently the work of some insect. He had, before then, submitted some
of these perforated mushrooms to Prof. S. Lockwood, who sent them to
Prof. C. V. Riley for his opinion. Prof. Riley replied that: "It is
quite likely that the damage was done by some myriapod, possibly a
Julus, or some of its allies. Only observation on the spot will
determine this point." As I never had any trouble with myriapods
attacking mushrooms and had seen nothing of this "bullet hole" work in
our own beds I was much interested in the question and determined to
look out for it, so I marked off a part of a bed and left that uncared
for. I soon found out the trouble. These holes are the work of slugs
which I have found and watched in the act of eating out the holes. To
find the slugs at work, one has to take his lantern and go out and look
for them at night. And to f