third, on the 17th; the fourth, on the 29th of August; the fifth, on
the 18th of September; and the sixth, on the 1st of October. The larvae
commenced to pupate on 13th of October.

The larvae of this curious species vary considerably in color. Some are
of a yellowish color, others are brown and tawny, others are black or
nearly black. My correspondent in Georgia, who bred this species the
same season as I did, in 1881, had some of the larvae that were green. In
all the stages the larvae have five conspicuous spines or horns; two on
the third segment, two on the fourth, and one on the last segment but
one; this is taking the head as the first segment with regard to the
first four spines These spines are rough and covered with sharp points
all round, and their extremities are fork-like. In the first three
stages they are horny; in the last three stages these spines are fleshy,
and much shorter in proportion than they are in the first three
stages. The color of the spines in the last three stages is coral-red,
yellowish, or black. In the fifth and sixth stages the spine on the last
segment but one is very short.

Here are a few and short notes from my book:

1st stage. Larvae, about one-third of an inch; head, brown, shiny, and
globulous.

2d stage. Larvae, dark-brown, almost black; spines, white at the base,
and black at the extremities; head shiny and light brown.

3d stage. Larve, fine black; head black; white hairs on the back;
spines, whitish, buff, or yellowish at the base, and black at the
extremities; other larvae of a brown color.