MEMOIKS OF THE NATIONAL ACADEMY OF SCIENCES. 
259 
are slightly suffused with a greenish yellowish tint. Jliud wings with a distinct whitish line, 
within which the Aving is white, but beyond dusky. 
The two pairs of hind tibial spurs are long and well developed. My original type is in the 
collection of the American Entomological Society, Philadeli)hia. 
E<i(j, — Diameter, L2 mm. Low, tiattened, hemispherical, much broader than high; in shape 
much like that of H. nnicolor^ but larger. Shell covered with polygonal areas, seen under .J-inch A 
eyepiece, with rather thin, not very distinct Avails, not quite so distinct as in iZ. unicolor, IMicro- 
pylar region forming a rosette of four circles of elongated, croAvded,' small polygonal areas. 
For several eggs I am indebted to Mr. Tallant, of Columbus, Ohio, They hatched July 27, 
in Maine. 
Larva^ Stage I. — Length of body wdthout the tails, 3.5 mm.; of the tails, 2.5 mm.; total 
length, G mm. Head moderately large, as wide as the prothoracic segment, t>ut wider than the 
body in the middle. The heac^ is unusually short, ffattened in front, pale greenish yelloAvish and 
rusty brown on the sides. On the ])rothoracic segment are two long, high, rust reddish tubercles, 
Avhich are darker at the end, conical and rounded at the tip, and bearing a light seta; they are 
inclined forward, and are situated far apart on the extreme side of the segment. The body behind 
is narrow, cylindrical, scarcely tapering to the ninth segment. The segments are not convex, but 
are transA^erscly AAU'inkled and uniformly yellowish green. Tlie only marking is a slight broken 
dorsal median obsolete line, represented by a faint elongated spot in the middle of the body and 
another near the end. 
The tails (stemapoda) are long, like those of Cerura, being almost as long as the body and 
A’ery slender. Their basal third is j)ale greenish; beyond, reddish broAvn, becoming paler just 
before the tip, which seems to be enlarged. 
It differs from the young larva of Cerura in the prothoracic horns being vertical and laterally 
projecting. 
Before molting the pink dorsal line becomes a little more pronounced. 
July 31 it was about to molt, when the length of the body Avas G mm.; of the tails, 4 mm.;, 
total, 10 mm. 
It Avas found just molted, on the morning of August 2. 
Stage TL — Length of body, 7 mm.; of the tails, 5 imn. ; total, 12 mm. 
The head is uoav wider than the body and entirely iiea-green or Avith a reddish hue; the body 
is a pea-green Avith a yelloAvish tinge. The tubercles on the pi'othoracic segment are nearer 
together at their base; they are dark coral-red, paler at base, and from them a darlc pinlc dorsal 
Unt extends bade to the snranal plate, tvidening on the second, fourth, and fifth {according to the 
figures the third, sixth, and. eighth abdominal) segments. The tails are pale on the basal half, 
beyond deep pink, and interrupted near the eud by a pale ring. All the legs, both thoracic and 
abdominal, are pale. green and of the same green hue as the body. The segments are transA'ersely 
wrinkled. 
Stage III. — AVhether the folloAAung description applies to the end of the second or beginning 
of the third, I am not entirely sure, but suppose it applies to the third stage. I Avas unable to find 
the cast skin. 
Length of body, 10 min.; of tails, 4 mm.; total, 14 mm. 
The head is noiv subconical, narrowing decidedly above toward the A'ertex; it now has a 
reddish pinlc stripe on each side, icith yellotv behind. The dorsal red stripe is now continuous, 
Avidening on the second and fourth abdominal segments, on the fourth forming a diamond-shaped 
spot. The two tubercles on the jirothoracic segment are largo, deep coral-red, and the space in 
front at their base is whitish, but Avider than in the next stage. 
A Hubdorsal irregular yelloic line, sending an oblique narrow bar or stripe from one segment 
downward to the lower and hinder edge of the one behind^ so that the second and third thoracic 
segments and abdominal segments 1 to 8 appear to have two narroio yellow oblique bars. The tails 
are uoav about one-third as long as the body, and still reddish. 
The larva has uoav acquired the features of the fully developed larva, Avith the exception that 
the horns of the prothoracic segment are larger and prominent. 
The following description is of an individual found on the underside of a beech leaf at 
Brunswick, Me., August G: 
