704 Wisconsin Academy of Sciences , Arts and Letters. 
close that it is difficult to say that they are not upon it. The 
same is true of those given as above for the pupa. Within the 
bases of the prolegs are humps hearing many bristles. 
Pupa. —Length, 10 mm. Width, 1.5 mm. Body in life 
green. Dorsal spines, III, 2. 2. 1-2 + 5-6. 1-2, VI. Two • 
lines of chitin,' not very conspicuous, on both dorsal and ventral 
sides of the abdomen. The tergum of the 1st segment bordered 
by chitin, the posterior lateral angles extended laterally into an 
acute point, studded with small spines, within which, on the 
posterior edge, is a narrow area of small, sharp spines. Lateral 
line inconspicuous, but extending the length of the abdomen. 
Gills simple, Fig. 13. Abdomen terminated by a pair of long 
spiniform processes, the distal third slightly curved, and the 
distal two-thirds studded with brown bristles. On the dorsal 
side of the last segment are two groups of 3-4 hairs each to hold 
the coils of the antennae in place. Labrum rounded, slightly 
longer than wide. 
Case. —Length, 17-19 mm. Width, anterior, 2 mm.; pos¬ 
terior, 1.3 mm. Cylindrical, straight, formed of small rectan¬ 
gular pieces of leaves, spirally arranged. As it is most frequently 
of green leaves it presents a very beautiful appearance. At 
pupation time it is shortened to the length of the body, about 
11 mm.: the posterior end is closed with a funnel-shaped mem¬ 
brane, much like that of Set odes, but with a smaller opening 
and a more acute central part. The anterior closing membrane 
is a disk with a central perforation. The case is attached to 
plants and usually has a few bits of leaves gathered about the 
ends. 
Habits and Occurrence .—Though the number of adults 
which may be obtained shows that this is a fairly common 
