Packard.] 
530 
[Feb. 19, 
spiracles is a much interrupted line of heavier dark red, somewhat 
curved or sinuous slashes, situated at the base of the legs, becom- 
ing 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 chitinous plate or shield from which 
arise four of these hairs, of which two are about one-tliird 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 color- 
less at the extreme tip. 
Second stage , after first moult. — Length, 6-7 mm., July 28th. The 
head is now more distinctly amber-colored and smaller in propor- 
tion than before. Body pale green, the dark brown stripes, espec- 
ially the dorsal one, being more distinct ; the dorsal line is con- 
tinuous, 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 first abdominal 
segment has grown paler. The tubercles on the eighth abdominal 
segment have each lost their single hair. 
Third stage, after second moult. — Aug. 5th. Length, 15 mm. The 
larva has now dropped the club-shaped setae, or “glandular hairs,” 
all the hairs being minute, tapering, and very short, while the 
lateral humps on the eighth abdominal 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 abdominal 
segment 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 line being the faintest, which encloses on the first abdom- 
inal segment a jet-black tubercle. Low down is an infra-spiracular 
row of twelve black spots situated at the base of the legs, when 
present. There are four black spots on the front part of the sur- 
anal plate, while the double reddish-black slashes on the lateral 
