—I15— 
ules, upon each of which are eighth ambulatory sete, one of the 
number being somewhat isolated and near the middle of the segment. 
On all twelve segments are four, short setze, placed in pairs each side of 
the middle ; those on the thoracic segments being between the isolated 
setae, just indicated. 
The pup average 16 mm. in length. In the female, the rostrum 
reaches considerably beyond the base of anterior femora, while in the 
male it extends very little beyond. On the rostrum, head and thorax 
are a few, sparsely placed bristles. 
Beneath, the nine segments are smooth, distinctly separated, and 
with a few short bristles. Above, the first segment is smooth, with ex- 
ception of the scutellar turbucle; the second is smooth, but on the 
third, fourth and fifth, each, is a transverse row of fleshy spines, ending 
with chitinous points, and placed near the posterior margins of the seg- 
ments. On the sixth, the spines are larger and almost dactyliform, 
being placed on a transverse, fleshy ridge. On the seventh segment, 
this ridge assumes a comb-like appearance, and is divided at middle, 
and on each of the parts thus constituted are five fleshy spines, all much. 
larger and longer than any on the preceeding segments. The eighth 
segment is nearly vertical, unarmed, but slightly wrinkled and con- 
spicuously setigerous. The ninth segment is nearly horizontal below 
and opposite the eighth, or curled under, as it may be called. This is 
armed with two, widely. separated proleg-like appendages, each ter- 
minating in a stout, chitinous hook, with the point turned directly 
backward. Abdomen, slightly broadest at third and fourth segments. 
The spines above described are doubtless to enable the pupa to push 
itself into a position favorable to the escape of the adult, which, within 
the stems of the plants, must be well nigh helpless. 
When full grown, the larve girdle the stems from within, at ir- 
regular intervals, much as does the larve of Lv/aphidion within the 
twigs of oak, hickory and other trees, except that only the thin outer 
bark is left intact, to be broken off by the winds; the object being to 
give the larva time to withdraw into its burrow and plug up the open- 
ing. In proof of this the ends of the stems are filled with fibrous 
matter, taken from within the stem. Doubtless this girdling is done 
during a calm time, else the wind would surprise the larva with its work 
but half finished, but how it obtains a knowledge of the state of the 
weather outside, is a problem. 
Notwithstanding all their precautions in filling the cavities at the 
ends of the stems, they are far from safe in their woody abodes, as, 
while protecting them from enemies of their own kind, even the thick 
