MEMOIllS OF THE ACADEMY OF SCIENCES. 
233 
It molted, i)assing into the last stage August 0-10. 
Last stage , — Length, 35 mm. Head as in 11. hiundata^ with a short lateral four-colored band 
of black, white, pink, and, externally, of yellow. Body icith no reddish brown spots on the side^ 
though (piite thickly speckled with dark red-brown. The rudiments or vestiges of the prothoracic 
horns are very slight, forming a yellowish, slightly swollen area. Doi*saI band snow-white, fading 
into yellowish on the side, where there is a series of line dark red- black dots; the line is widest on 
the second and third abdominal segments, and at the suture, between the fourth and fifth segments, 
the anterior part of the band connects by a narrow neck with the posterior division of the band, 
which contains a whitish vascular line, bearing reddish dots on each side. Each side of the body 
on abdominal segments 7 to 10 snow-white, including the upper part of the anal legs, which are 
marked with a red line. The thoracic legs are green, with a black dot in the mitldle. 
lycscription of another larva on the red maple (PI. XXXI, fig. — The egg was found July 
3 on the red maple at Brunswick, Me., and it hatched July 11 or 12. The caterpillar eats the 
surface of the leaf when first hatched. 
Larva., ^itaye I. — Length, 0 mm. Head moderately large, a little wider than the body, rather 
shoi't, smooth, Avith a few scattered hairs, pale cherry-red. The body is moderately thick, a little 
compressed, tapering from the prothoracic segment to the aual legs, the end of the body being 
upheld, the aual legs long and slender, but not vso long as the tenth abdominal segment is wide. 
It bears a remarkable series of large black forked dorsal horns, so as to api>eai like a young 
Ceratocampid. The first thoracic is slightly wider than the third thoracic segment, and bears a 
large shining black cervical plate, which is nearly twice as wide as long, the posterior edge being 
' straight and blacker than in front. From this plate arise two large black horns, each with three 
large, long branches or tines, which are thick, acute, ending in a dark bristle; the trunk of the 
spine is short, the tines being three times as long as the undivided trunk, while there is a fourth 
minute spur below the others; the two anterior tines rise high and arch over the head. 
The second and third thoracic segments are unarmed, smooth, Avith no tubercles, but wrinkled. 
From each abdominal segment (1 to 8) arises a pair of large high dorsal black horns. Those on 
the first abdominal segment are nearly twice as large as those on the succeeding segment, and 
arise from a large black plate which is entire, undivided; the horns in these, as all the abdominal 
ones, are a little bent beyond the middle, at the end sending oil* a minute sharp spine, Avhile they 
end in a short black bristle. The six succeeding black dorsal plates are divided into two halves, 
each half lunate in shape. The third pair of abdominal horns are nearly as large as the first pair, 
while the three pairs following are of the same size as the second pair. The last pair of horns 
arise from the tenth segment, Avhich are not quite so large as those on the eighth, and the segment 
bears a large undivided black plate Avhich extends down the sides and to the base of the anal 
legs, the latter being slender, rather long, shining black, and held extended out horizontally. 
There are no horns on the ninth segment. 
The body is transversely wrinkled and the ground color is pale yellow, but the sides are so 
densely covered with fine, short, Avavy, cherry-red lines as to appear red. Between the horns on 
the sixth and seventh abdominal segments is a large clear yellow dorsal area. The tlioracic legs 
are black; the middle abdominal legs cherry-red, becoming blackish toward the plantie. 
At times it Jerks its head rai)idly from si<le to side, as if to scare away an enemy. 
Another larva (FI. XXX 1 1 1, fig. 1, !«), — This was a rather belated larva with the body some- 
Avhat shi-lA^eled, which occurred on the oak at Providence September 20-24. Length, 15 mm. Head 
moderately high and narrow; on each side of and rather remote from the distinct median suture 
and nearly parallel to it is a dark thread line, the frontal space inclosed being clear of dots. The 
ground color of the head is like new parchment; on each side are dark specks, forming a band on 
each side between the antenme and the prothoracic tubercles. ‘ The antenuie are bright yellow. 
First thoracic segment with two twin contiguous yellowish humps from ichich arise two 2)ale raw 
sienna-brown tubercles, each ending in a piliferous tubercle, rising quite high over the head; below, 
not quite near the end, are two minute tubercles, the remnants of the tines of the horns of the' 
earlier stage. On all the i)osterior segments of the body the piliferous tubercles are obsolete, 
and can not be detected with tlie lens. Two thoracic dorsal brown i)arallel lines beginning between 
the prothoracie tubercles, coiu'erging to the second thoracic segment and separating so as to form 
