MEMOIES OF THE ^"ATIOXAL ACADEMY OF SCIENCES. 
237 
t^yo others above. Tliere are no marking's on the second and third thoracic segments, bnt on each 
abdominal segment there is a pair of acute dorsal brown spines, those on the lirst and eighth 
segments being almost twice as large as the others. A pair is also situated close together on the 
ninth segment. The end of the body is elevated, the anal legs small, slender, reddish brown. 
The body is pale greenish yellow. A dorsal reddish brown band beginning from between the 
horns, and widening so as to inclose the two spines on the first abdominal segments, then breaking 
up into two lateral lines so as to inclose a greenish yellow area extending from the middle of the 
first to the middle of the third segment: farther back it again breaks apart so as to inclose a pale 
yellowish spot on the sixth and seventh segments; from thence the bands extend out upon the 
anal legs. 
The thoracic and middle abdominal legs are pale, like the body.^ 
Stage III. — Length, 10 mm. It is green, smooth, with two large dorsal, conical, prothoracic 
spines, not, however, much exceeding the vertex of the head. The head is narrow toward the 
vertex and as wide as the body in its thickest part — i. e., the middle; it is yellowish green, with a 
double red line on each side, the outer line being much broader than the inner. The body tapers 
to the end, and the anal legs, though long and slender, are used in creeping. The body is pea- 
green ; the prothoracic spiims are yellowish at base, reddish brown at the tip ; from the end of each 
spine a narrow reddish thread line passes back and the two unite on the back of the prothoracic 
segment to form a broad median dorsal line ending on the third thoracic segment. On the fourth 
abdominal segment Is a shield-shaped, bright brick-red si)ot; on the seventh a double linear, 
coalesced oval reddish spot. A pair of widely separated, reddish, narrow, i)arallel dorsal stripes 
on the top of the eighth abdominal segment, while the abdominal legs are striped externally with 
red; all the other legs are pale greenish. A pair of broad, subdorsal, yellow, loug lines extending 
from the sides of the prothoracic segment to the side of the anal legs. There are no other spines 
than on the segment next to the head. 
Another larva of this species was found feeding on the rock maple, at Brunswick, Me., July 
21, 1893; it molted August 2. It shook its head rapidly from side to side when disturbed. 
Stage II, — Length, 10 mm. Body moderately slender, somewhat compressed. Head and the 
entire body reddish livid brick-red. The horns as in PI, XXXIl, fig. 1, 1«, and dull' reddish. 
The body is covered with fine reddish and yellow, short, irregular lines, which are somewhat 
confiuent, but the effect is dull reddish. On the first to third and on the fifth, sixth, and seventh 
abdominal segments is a dorsal, median, bright yellow spot, which becomes on the seventh segment 
forked, and resembles the similar spot in Schizura (these spots are not iiresent in guttivitta^ 
which is entirely reddish, and in this stage it has two tubercles representing the horns of its 
first stage). 
July 28. • It is now 12 mm. in length; it has not yet changed, but now there is much more 
green ou the sides of the body, and the yellow dorsal spots are larger and more wliitish. There 
is a short white line between the base of the horns. There are two whitish dorsal patches on the 
ninth abdominal segment in front of the siiranal plate. It molted August 2. 
Stage Ilf. — Length, 15 mm. The horns are still retained in this stage. It is, perhaps, a little 
stouter than before. It wags its head rapidly from side to side when disturbed. The head is now 
* On examining Dr. Dyar's specimens I jind that TI, hiiivdaUi difiei's in Stage I from //. guttivitta in having the 
dorsal spines ou abdominal segments 1-8 all of about the same size, those ou segment 1 and 8 being no longer 
than those on segments 2 to 7, 
Another larva sent by Mr. llridgham perhaps represents Stage III immediately after molting. Tlie following is 
a description of it: 
Length, 8 mm. The head is very largo, much wider than the body (not yet filled out), and ]>rodnced toward 
the vertex; on each side of the front is a dark, narrow, distinct line, outside of which is a dull reddish ditfuso lino. 
The body tapers to the end, and is llesh colored, with greenish and yellowish hues. The two large conical prothoi’acic 
spines are flesh colored or very light brown, becoming reddish brown at tlie end. A dark, dilfuse, vaudyke-brown 
dorsal line, double between the tubercles, uniting behind them and then diverging so as to inclose a whitish oval 
area, containing a jiair of minute, short, iiarallel reddish dashes ; Anally the baud unites to form a dark patch on the 
fourth and flflh abdominal segments; this divides again and stops before reaching the eighth segment, on which is 
a diffuse dark patch more or less spotted with 2>iile marks. The sides of the body are more or less mottled and 
streaked with reddish brown. 
