has been the case with the women who wrote "Caterpillars and their
Moths", the most invaluable work on the subject ever compiled.

A captive moth feels and resents her limitations. I cannot force
one to mate even in a large box. I must free her in the conservatory,
in a room, or put her on an outside window br door screen. Under
these conditions one will place her eggs more nearly as in freedom;
but this makes them difficult to find and preserve. Placed in a
box and forced by nature to deposit her eggs, as a rule, she will
remain in one spot and heap them up until she is forced to move to
make room for more. One big female Regalis of the last chapter
of this book placed them a thimbleful at a time; but the little
caterpillars came rolling out in all directions when due. In my
experience, they finish in four or five nights, although I have
read of moths having lived and placed eggs for ten, some species
being said to have deposited over a thousand. Seven days is
usually the limit of life for these big night moths with me;
they merely grow inactive and sluggish until the very last, when
almost invariably they are seized with a muscular attack, in which
they beat themselves to rags and fringes, as if resisting the
overcoming lethargy. It is because of this that I have been forced
to resort to the gasoline bottle a few times when I found it impossible
to paint from the living moth; but I do not put one to sleep unless
I am compelled.

I never have been able to induce a female to mate after confinement
had driven her to begin depositing her eggs, not even under the
most favourable conditions I could offer, although others record
that they have been so fortunate. Repeatedly I have experimented
with males and females of different species, but with no success.