1890 .] 
533 
[Packard. 
than those on abdominal segments 3 to 6, the latter slightly 
decreasing in size from before backwards, and all considerably 
smaller than those on the ninth and tenth abdominal segments. 
All the tubercles, except those on the head, bear slender hairs 
which are about one-third as long as the body is thick, and which 
are broad and flattened at the end, which is abruptly truncate. 
All the tubercles on the body are of the same color as the bocty, 
which is of a general mottled reddish hue, with no distinct traces 
of longitudinal bands, except along the base of the legs ; the skin 
is minutely dotted with white specks and the small lateral black 
piliferous warts. 
The only bright spots are the light straw-yellow bases of the 
dorsal tubercles on the second and third thoracic segments, be- 
sides a pair of latero-dorsal oblique bright yellow patches on the 
seventh abdominal segment and a small bright yellow spot on each 
side of the base of the tenth segment. All the legs, both thoracic 
and abdominal, are concolorous with the body. The anal legs are 
normal, but smaller than the others, with numerous hooks, and are 
held slightly uplifted. 
Third stage . — Length 9 mm. The body is rather stouter than in 
the previous stage. The head is black, and all the tubercles on 
the head and body, together with the thoracic legs, and the scale 
on the outside of the end of the abdominal legs are now black. All 
the tubercles end in a hair, now acute and simple, while the tu- 
bercles themselves are higher and more pronounced than before. 
There are traces of a subdorsal and two lateral lines (these are 
effaced by the alcohol). 
Fourth stage . — Length 13 mm. The head is still black, with the 
two large black tubercles present, though smaller in proportion 
than before. All the tubercles on the body are much as in the 
last stage in their relative size and shape ; those of the third tho- 
racic segments are of the same size and height, the pair on the first 
abdominal segment being longer and larger than the others, and 
those on the eighth abdominal segment have not increased propor- 
tionately in size, but are still nearly twice as large as those on the 
seventh segment. The bod} 7 is still reddish, with (in the alcoholic 
specimen) traces of three or four reddish lines on each side, which 
are bordered more or less regularly with whitish. 
Fifth and last stage . — Length 23-24 mm. Some notable changes 
have occurred in the coloration, while the shining black spines are 
