mentioned in my report for the year 1879; _Orgyia leucostigma_, from ova
received on December 29, 1880, from Madison, Wis., which hatched on the
27th of May, 1881.

The third American species reared under glass is the following very
interesting bombyx: _Ceratocampa (Eacles) imperialis_. The pupae of
this species are rough, and armed with small, sharp points at all the
segments; the last segment having a thick, straight, and bifid tail. The
moths, which measure from four to about six inches in expanse of wings,
are bright yellow, with large patches and round spots of reddish-brown,
with a purple gloss; besides these patches and round spots, the wings
are covered with small dark dots. The male moth is much more blotched
than the female, and although of a smaller size, is much more showy than
the female.

With twenty-four pupae of Imperialis I obtained nineteen moths from the
21st of June to the 19th of July; five pupae died. Two pairings took
place; the first from the evening of the 13th to the morning of the
14th; the second from the evening of the 15th to the morning of the 16th
of July.

The ova, which are about the size of those of Yama-mai, Pernyi, or
Mylitta, are rather flat and concave on one side, of an amber-yellow
color and transparent, like those of sphingidae. When the larvae have
absorbed the yellow liquid in the egg, and are fully developed; they can
be seen through the shell of the egg, which is white or colorless when
the larva has come out.

The larvae of Imperialis, which have six stages, commenced to hatch on
the 31st of July; the second stage commenced on the 7th of August; the