Packard.] 
486 
[Feb. 19, 
of hooks, and these legs form a singular contrast to the long fila- 
mental anal legs of the species of Cerura and of Heterocampa 
marthesia. 
The crochets of the other membranous or abdominal legs form 
a nearly complete circle ; beside the inner series of crochets, twenty- 
four in all, of which those (six to ten) at each end are larger forming 
two alternating rows, the circfe is nearly completed by an outer 
curved single series of six hooks or crochets. 
It is not improbable that these extra crochets, completing the cir- 
cle on the planta of each of the four pairs of middle abdominal legs 
are developed as a compensation for the loss by disuse of the anal 
legs, enabling the caterpillar to grasp or anchor itself more firmly 
to the surface over which it creeps, while it holds up the heavy end 
of the body. The larva moulted the second time June 28-29. 
Third stage . — June 28, 29. Length 7-8 mm. Much as in the 
second stage, but the body is a little paler on the other segments 
than before, the first thoracic, and first and seventh abdominal being 
light yellow, mottled with pale brown. The head is as broad as the 
body, the latter being widest across the thoracic segments, thence 
gradually tapering to the tip. The head is black-brown, with three 
transverse pale yellowish bands ; the upper one composed of two oval 
spots ; the second one forming a long narrow stripe becoming a little 
sinuous on the sides of the head ; the third stripe is a broader and 
shorter V-shaped band situated just over the clypeus, which is of 
nearly the same pale hue. The subdorsal pro thoracic piliferous 
warts are now smaller than the lateral ones, those of the second and 
third thoracic segments being larger and more conspicuous than be- 
fore, and one of them is double, thus forming a group of three warts 
on each side. The ninth abdominal segment is in this stage as dis- 
tinctly and completely developed as the eighth, a very unusual feat- 
ure in lepidopterous larvae in which the suture between the ninth and 
tenth (terminal) segment is usually obsolete, these segments being 
more or less rudimentary. The tenth is almost wholly represented by 
the enlarged suranal plate, while the paranal lobes, together with the 
anal legs, are nearly obsolete. Across the top of the ninth segment 
is a slightly curved row of four prominent piliferous warts, much 
larger than those on any other abdominal segments, and on ekch 
side low down is a large wart covered with about eight fine sharp 
dark short bristles. The supra-anal spine is now simply square and 
