MEMOIES OF THE NATIONxVL ACADEMY OF SCIENCES. 
175 
Larva of first stage^ just after hatching. — July 25. Length, 3-4 mm. The head is very large, 
nearly twice as wide as the body behind the middle, rounded, and with a fine, narrow black stripe 
along the hin<ler edge; it is honey yellow, with scattered black hairs. Body moderately slender, 
gradually diminishing in width to the end, the anal legs being long and slender, larger than in the 
young of Schizura. They are forked, long, and slender; the terminal third evaginate, nearly as. 
large at the end as at the base, and are held lifted up, together with the two preceding segments^ 
at an angle ot about 45 degrees. The claws are entirely absent, the tip being soft, retractile, and 
extensile, and the leg itself being provided with 1 2-13 stiff, dark, acute seta*. They <liifer but slightly 
from those of the fully fed caterpillar. The end of the leg is retracted by three slender retractor 
muscles, one being single, the two others united near their insertion into the retractile portion. 
The other abdominal legs are i)rovided with a semicircle of ten hooks each, the inner two 
hooks of one set being very short. All the legs, both thoracic and abdominal, are dull greenish. 
The body is deep pea green, the surface shining. The first abdominal segment shining red, with 
two slender, papilliform, uonpiliferous subdorsal deep red tubercles, situated in or just below the 
subdorsal lines. There are two similar but much smaller piliferous red warts on the eighth 
segment. Body behind the head with five red or reddish black lines; the single dorsal and the 
two subdorsal lines narrow, nearly continuous, scarcely broken. The lateral line is slightly 
interrupted like the others at the sutures. Below the spiracles is a much interrupted line of 
heavier dark red, somewhat curved or sinuous slashes, situated at the base of the legs, becoming 
less distinct behind the fourth pair of abdominal legs. 
The hairs are stiff and black, mostly thick and clavate, and pale at the extreme tip. Those 
on the head are slightly knobbed. On the prothoracic segment is a chitiuous plate or shield from 
which arise four of these hairs, of which two are about one-third longer than those of the meso- 
and metathoracic segment; they are about as long as the body is thick; those on the second, 
third, and fourth abdominal segments are larger and longer, more distinctly clavate than those 
elsewhere; they are smooth, black, but clear and colorless at the extreme ti[). 
Second stage, after first molt. — July 28. Length, 6-7 mm. The head is now more distinctly 
amber colored and smaller in pi*oportioii than before. Body i^ale green, the dark brown stripes, 
especially the dorsal one, being more distinct; the dorsal line is continuous, the two lateral ones 
somewhat broken. The hairs are black, not so much club-shaped as before. The markings show 
little change from the first stage, but the reddish lirst abdominal segment has grown paler. The 
tubercles on the eighth abdominal segment have each lost their single hair. 
Third stage, after second molt. — August 5. Length, 15 mm. The larva has now dropped the 
club-shai^ed setai, or “glandular hairs,” all the hairs being minute, tapering, and very short, while 
the lateral humps on the eighth segment are decidedly larger than before and marked with two 
parallel reddish brown lines, so that in respect to these humps the characters of the fully grown 
larva are nearly assumed, while the tubercles on the first segments are still slightly larger in 
proportion than in the mature larva. 
The head is of moderate size, but little wider than the body, rounded, and orange-reddish. The 
body is smooth and shining, straw yellow, the line blackish; the dorsal black line ends on the 
smooth black knob on the eighth segment. The three lateral black lines are more or less 
interrupted, situated in a broad whitish band, the middle lino being the faintest, which incloses 
on the first abdominal segment a jet-black tubercle. Low down is an infraspiracular row of 
twelve black spots situated at the base of the legs, Avhen present. There are four black spots on 
the front ]>artof the suranal plate, while the double reddish black slashes on the lateral humps of' 
the eighth abdominal segment are more pronounced, than in the earlier stages. The extensile, 
uplifted anal legs are black at the tips. 
Fourth stage, after third molt. — August 10-11. Length, 22-24 mm. In this stage the larva only 
dittersfrom the preceding one in the deeper, more distinct colors of the body and its markings, 
while the body itself is larger and thicker. The black tubercles on the first abdominal segment 
are slightly smaller than before. 
Fifth stage, fully fed lariut. — Length, 55 min. Head rounded, greenish amber; body smooth,, 
of nearly uniform thickness, with a low rounded Jet-black knob oii top of the eighth abdominal 
segment, in front of which is a narrow black dorsal line; anal legs very slender, uplifted. Three 
lateral black lines close to each other and forming a broad, dark, wavy band. BavSe of all the legs 
black, but the legs themselves pale; ground color of body, deep pink, tiesh color. Differs from 
