the third and fourth stages, the larvae of _S. cecropia_ and _S. gloveri_
are also nearly alike; the principal difference between these two
species and _S. cecropia_ being that the tubercles on the back are of a
uniform color--orange-red, or yellow--while on Cecropia the first four
dorsal tubercles are red, and the rest yellow. The tubercles on the
sides are blue on the three species.

The larvae of the hybrids _Gloveri-cecropia_ were, as far as I could
observe, like those of Cecropia, but I noticed some with six red
tubercles on the back instead of four, as on Cecropia. They were reared
on plum, apple, and _Salix caprea_; in the open air.

The larvae of _Samia gloveri_ were reared, during the first four stages
on a wild plum-tree, then on _Salix, caprea_, and I reproduce the notes
taken on this species, which I bred this year (1881) for the first time.

Gloveri moths emerged from the 15th of May to the end of June; five
pairings took place as follows: 1st, 4th, 9th, 24th, and 26th of June.
First stage--larvae quite black. Second stage--larvae orange, with black
spines. Third stage--dorsal spines, orange-red; spines on sides blue.
Fourth stage--dorsal spines, orange or yellow, spines on the sides blue;
body light blue on the back, and greenish yellow on the sides; head,
green; legs, yellow. Fifth and sixth stage--larvae nearly the same;
tubercles on the back yellow, the first four having a black ring at the
base; side tubercles ivory-white, with a dark-blue base.

The above-mentioned American species, like most other silk-producing
bombyces, were bred in the open air; but besides these, I reared three
other species of American bombyces in the house, under glass, and with
the greatest success. These are: _Hyperchiria io_, a beautiful species