238 
MEMOIRS OF TUE ^TATIONAL ACADE3IY OF SCIENCES. 
high, conical, reddish brick, with a broad yellowish stripe in front, including the clypeus, and 
extending backward on the vertex to the occiput; sides of the head behind yellowish. 
The body is now yellowish green, with broken dull reddish lines on the sides and a faint 
reddish patch on the sides at the base of the third thoracic and llrst abdominal segments, and also 
on the third and sixth abdoruinal segments. Between the base of the horns is a broad whitish 
green band. The back is reddish, inclosing a white dorsal broad line, widening rapidly behind, 
edged with yellowish; this line ends on the fourth abdominal segment. Another band of the 
same color begins on the fifth segment and forks on the seventh segment. Anal legs now a little 
longer than before and lined with reddish on the outside. The anal legs are rather long and 
slender, and slightly retractile at the end. 
At the end of the penultimate stage, when about to molt, the prothoracic horns are about as 
long as the head is vide. 
There is an oblique spot on the side of the first abdominal segment which is directed forward, 
ending at the base of the third thoracic leg; also a large lateral brown spot on the side of abdom- 
inal segments 3 to o, passing down upon the base of the first pair of abdominal legs, and another 
oblique russet or sere-brown spot on the side of the seventh abdominal segment, reaching to 
the base of the pair of middle abdominal legs. The dorsal median baml is snow-white, and the 
anterior portion is connected by a narrow neck at the suture between the fourth and fifth 
abdominal segments with the posterior portion; the upper side of each anal leg is also white. It 
molted August 11. 
]\Ir. Bridgham has figured the larva now to be described, and which he found on the oak at 
Providence, September 10 (PI. XXXII, figs. 3, 3a), I also found it at Brunswick, Me., September 8. 
Stage IV, — Length, 20 mm. The head is deeply bilobed on the vertex, each lobe ending in a 
large conical rounded lobe; it is dull lilac, and is much paler, almost rosy, up and down the front. 
The first thoracic segment shows no signs of horns, these now being rejmesented by two minute 
dark tubercles, which do not seem to bear a hair. There are no other tubercles on the body, as the 
hairs arc fine, minute, and arise from very minute, microscopic warts. The body tapers to the anal 
legs, which are long, slender, and retractile, the small plantm being entirely so. The suraual plate 
is scarcely separated by suture from the ninth segment; it is smooth, and narrows toward the end, 
where it is regularly rounded; at and below the end are two round tubercles situated above the 
base of the anal legs. The body is delicate green, with a yellowish hue. A dorsal broad, very 
white band originates between the prothoracic tubercles, broadens to the third abdominal segment, 
ending in a triangular point on the fourth segment opposite the apex of another broad white line, 
which begins on the fifth abdominal segment and splits into two on the hinder part of the seventh 
segment, forming t^vo broad subdorsal lines which extend to the end of the anal legs, the inner 
aspect of which is reddish pitch in color. A similarly colored median stripe on the suranal 
plate, inclosed between the white subdorsal bands. On each side of the first abdominal legs is a 
dark oblique blood-red patch inclosing the spiracle and extending to the third pair of feet, widening 
at the end. A large lateral, roundish, oval patch on the side of the third segment; it is dark and 
paler red and extends down to the planfie of the first abdominal legs. On the sides of the sixth 
abdominal segment and inclosing the spiracles is a dark blood-red spot, like coagulated blood, 
inclosing the spiracles, and in front bearing a light pink irregular patch,, and continued upon the 
base of the fourth pair of abdominal legs. The spiracles are deep orange-brown. The thoracic 
legs dark red, greenish at the sutures. The three last pairs of middle abdominal legs with a reddish 
crescent-shaped dash above the plaiite. 
Another caterpillar (PL XXX II, tigs 3, 2a) was found in two successive years on the red maple 
at Brunswick, Me., August 20-25. It rests on the underside of the leaf on the midrib, the head 
touching the leaf and the anal legs outstretched and holding on to the midiub. It was about to 
molt, as the prothoracic segment was swollen. 
Stage IV, — Length, 25 mm. The head is pale flesh colored, narrow, the vertex ijrolouged 
above into two rather acute piliferous cones, each with a brown line behind. The larva may be 
readily recognized by a pair of prothoracic horns which are long and high, being about half as 
long as the body is wide, with three prongs; they are light brown in color. The body is very 
narrow, compressed, pale green, the color of the leaf on which it feeds. Along the body is a 
