196 
MEMOIRS OF THE NATIONAL ACADEMY OF SCIENCES. 
The prothoracic segment is wider than the succeeding ones, with two very large dorsal 
piliferous tubercles, situated far apart, wliile those on the meso- and nietathoracic segments are 
minute and situated imt so near together as those on the abdominal segments. The tubercles on 
the tirst, third, eighth, and ninth abdominal segments are larger than those on the other segments. 
They are all darker than the body, and dull amber-brown in color. 
The body in general is greenish yellow, with a pale reddish band around the prothoracic 
segment and around the first, third, and eighth abdominal segments. The hairs are in most cases 
about twice as long as the body is thick. On the head are a few scattered sim])le hairs, pointed at 
the end. Those on the segments behind the head are in general clavate at the tij). Those of the 
two large prothoracic tubercles and of the larger warts on the eighth and ninth abdominal 
segments are nearly twice as long as most of the others, and are slightly bulbous at tip. Those 
on the meso- and metathoracic segments are about a fourth longer than most of those on the 
succeeding segments to the eighth abdominal. 
The larva just before the first molt is nearly twice as large as when first hatched, but it can 
be easily distinguished by its hams alone from those in the second stage. 
The thoracic legs are black, the abdominal, including the anal legs, dusky. Before molting 
the larva doubles in length, finally being (> mm. long. 
Second staf/e, after the first molt , — Observed to molt July 19-24, Length, 7-8 mm. The larva is 
very different from the ijreceding stage. Tiie head, though smaller in proportion to the rest of the 
body, is still much wider than the body, ending in the vertex in two conical tubercles, much as in 
the adult; color of the head brown, with four rows of large round pale spots, three in each rowj 
the sides of the head and occiput pale. Prothoracic segment with two large black-tipped conical 
tubercles, and two mucli huger ones on the first and eighth abdominal segments, those on the 
first being larger than those on the eighth segment and several times larger than in the first 
stage; there is a smalhir pair on the fifth ab<lominal segment. Anal legs long and slender, of 
much the same proportions as in the fully fed larva. ’ Color of the body greenish, but the 
prothoracic and first, third, fifth, and eighth abdominal segments reddish. The piliferous 
tubercles on the side of the body are not so large and prominent as in Stage’l. 
The hairs are not quite so long as the body is thick and of more uniform length all over the 
body than in Stage 1, and decidedly different in shape from those of the first stage; they are 
.shorter, thicker, and somewhat shovel-shaped, being broad and fiat at the end and slightly 
notched or toothed on the edge, the flattened poi'tion being striated; those of the head are still 
•simi^le. Those of the two prothoracic tubercles are twice as long as those on the meso- and 
jnetathoracic segments, the hairs on the latter two segments and on the abdominal being 
;Somewhat shorter than the body is thick; those of tlie two larger tubercles on the eighth and 
ninth segments are a little longer than those on the smaller tubercles at the end of the body. In 
nearly all the hairs the shaft is, under a i-inch Tolies objective, seen to be finely spinulated. 
Third stagey after the second, molt , — Observed to molt August 1-2. Length, 10-11 mm., finally 
becoming 13-14 mm. The head, tubercles, and hairs (seta^) much as before, the head retaining the 
same style of markings. The colors of the body, however, have changed; there is an irregular 
double dorsal reddish resinous line on the thoracic segments. On abdominal segments 2 to 4 is a 
single line, and on the same segments the dorsal tubercles are yellowish gveen, as are those on 
segments 6 and 7. The ground color of the body is yellowish green, irregularly marbled on the 
sides with resinous red. The anal and other abdominal legs are tinted with reddish. There is a 
lateral reddish line along the sides of the thoracic segments; a double dorsal reddish line on the 
seven terminal abdominal segments extending out on the uplifted anal legs (nut developed in 
Stage 11, though faintly indicated). 
Those observed August 4 later on in tliis stage had changed a little since molting; have 
assumed more of the distinctive coloring of the fully fed larva; the yellowish green parts, 
especially on the thoracic segments, are now of a bright pea-green, while the silvery white 
V-shaped mark on the sixth to eighth abdominal segments, so characteristic of the genus 
Schizura, is now very distinct. (This mark is faintly indicated in the previous stage by two broad, 
.slightly converging, Avhitish yellow dashes on the seventh segment and a median pointed whitish 
