1890 .] 
517 
[Packard. 
hair ; the pair of setae on the inner of the four warts being nearly 
twice as long as the body is thick. The hairs on the third thoracic 
segment are pale gray, like those on all the posterior segments ex- 
cept the eighth to tenth. On the abdominal segments the four pili- 
ferous warts are on segments 1-5, arranged in a semicircle rather 
than a trapezoid, but on segments 6-8 form a trapezoid, the two 
anterior warts being paler and smaller than those behind, with the 
marked exception of the pair on the first and eighth abdominal seg- 
ments, where they are about twice as large, and surrounded at the 
base by a deep reddish patch. 
The suranal plate is also very distinct, blackish, and bears about 
eight or ten prominent piliferous warts, but the hairs are fine and 
short. The thoracic legs are black, the abdominal legs with a 
black cliitinous scale on the outside near the end. The spiracles 
are round and remarkably small. All the abdominal feet possess 
ten crochets, and no bulbous hairs are present, all tapering to the 
end, but the skin is covered with numerous fine, microscopic, short 
tapering hairs. The body is faintly striped on each side with three 
interrupted dark red lines. It will thus be seen that the dorsal 
twin tubercles on the first and eighth abdominal segments, and 
the mode of coloration of the last stage, are already indicated in 
Stage I. 
Second stage . — Length (after the first moult), 18 mm. Mr. 
Edwards’ description, judging by the great length of the larvae, 
probably applies to the end of the stage, just before the second 
moult. His description is as follows : — “Head black, shining, with 
double fovea in front. Second (first thoracic) edged in front with 
bright yellow. Body black, with a series of bright yellow longi- 
tudinal stripes, those of the dorsum being the most distinct ; four 
and eleven (first and eighth abdominal) have small black tubercles 
in the centre. All the segments bear small, jet-black, piliferous 
tubercles. The hairs of the body are all sordid white. Anal seg- 
ment black. Under side dull yellow. Feet black at the tips.” 
Final , or fifth stage. — Length, 38 mm. In the mature larva 
the cervical shield is divided into two separate halves, but the head 
is still black and rounded, while the piliferous warts on the first 
and eighth abdominal segments have become twinned, papilliform, 
hirsute, dark, prominent (probably slightly movable) tubercles. 
The body is finely striped, longitudinally, with yellow (this being 
the ground color) and dark lines, and is provided with short, pale 
