232 
MEMOIKS OF THE l^ATIOI^AL ACADEMY OF SCIEN^GE8. 
of the second abdominal pair are much smaller than the pair in front and those behind. Those* 
of the third abdominal segment are not so large as ‘.he first, but much longer than those behind.. 
The ])air on the eighth abdominal segment are of the same size and shape as those on the first 
abdominal segment, but are slightly shorter. The suranal plate is rounded, convex, shining 
black, giving rise to a i)air of black horns shorter than the shortest ones in front. Thoracic legs 
blackish; the middle abdominal legs of a pitchy color. 
It molted July 1!), being perhaps belated, as are most in the next stage. 
laitage IL — Length, 5-0 mm. Head and body uniformly liver-colored or reddish brown. Head 
conical, rounded, entirely liver-red, like the body, with no lateral bands or any markings. Now 
there is only a ^single pair of very short horns or tubercles situated on the prothoracic segineiitj ivith 
no traces of the others. These prothoracic tubercles aro cylindrical, short, scpiare at the end, 
which is dai*k and no longer than one-third the length of the anal legs, with no branches. The 
end of the body is uplifted; the anal legs are concolorous with the body. The body gradually 
tapers to the end, with no traces of any markings. 
1 found, July 11, other larvm on neighboring maple trees, of which the following is a descrip^ 
tiou, and think it is the same species: 
Stage III. — Length, 10 mm. The head is 7iow very large, subtriangular, rising higher than 
the body behind, and much wider than the body; greenish, with a broad, pale reddish band on 
each side, meeting on the vertex. The prothoracic horns are now represented by the conical 
luliferous tubercles of moderate size, dark reddish at the end, from each of which a reddish line 
passes back to the first abdominal segment. The third abdominal segment is pale reddish above, 
the hue passing down to the base of the first pair of abdominal legs. Along the back of 
abdominal segments 4 to (> is a pale reddish band interrupted by the sutures. On abdominal 
segments 7 to 9 is an elongated, reddish, diamond-shaped, dorsal, x>ale red band, including the 
suranal plates; a faint reddish lateral spot on the side of the sixth abdominal segment. 
Abdominal legs yellowish, concolorous with the body. Anal legs long, slender, upheld; thoracic 
legs ])ale; the sides of the body just above their base discolored with x^ale reddish. A distinct 
subdorsal yellow line on each side of the body, not so distinct on the last three abdominal segments. 
In three specimens, with little doubt of this species, which were 15 mm. in length, there are 
two x>arallel red lines extending backward from the imothoracic tubercles and diverging, as in 
the smaller specimens, on the first abdominal segment. On the third abdominal segment is a 
crescentiforui dorsal red spot, the horns iKunting anteriorly; on the segment behind is a median 
triangular red i)atch, and on the five succeeding ones collectively is a much smaller one, cleft 
behind. In this specimen the hollow of the crescentiform spot is filled with a yellow curved spot, 
but in one of the other examxdes there is in place of it a white patch, and the crescentiform spot 
is represented by two short i)arallel lines. There is another reddish dorsal patch common to the 
seventh and eighth segments. Indeed there is much variation in the markings. The suboval 
yellow lines are distinct. There are four small, short, lateral, obli(iue, reddish patches on the 
side of the body, one at the base of the third paiv of thoracic legs, another at the base of the 
fourth pair of abdominal legs, and in one of the sx)ecimens one at the base of the first i)air of 
abdominal legs. 
Stage IV. — Length, lS-20 mm. Head largo, wider than the body, fiattened in front. The 
band on each side is rather short and broad, not reaching to the base of the antenme and not 
meeting abov^c on the vertex; it is composed of lines of four colors, being black within, then white, 
then a broad pink baud bi'oadly shaded externally with yellowish. No tubercles on the top of 
the prothoracic segment, but a yellowish patch containing two lines forming the beginning of the 
two parallel reddish sienna-brown lines, which end on the first abdominal segment. Behind this. 
si)ot are three yellow dorsal lines which end on the hinder edge of the third abdominal segment.. 
On this and the next segment is a conspicuous forked sienna-brown line, inclosing on the third 
segment a white triangular patch. The two subdorsal yellow lines are broad and distinct, edged 
within with reddish on the eighth segment and on the suranal idate. ISides of the body Avith 
scattered black specks. Spiracles yellow, finely edged with black. A slight, short, narrow oblique- 
line on the side at the base of the legs of the third thoracic and sixth abdominal segments, A 
reddish line on the inside of the anal legs. A black dot on the middle of the thoracic legs. 
