690 Wisconsin Academy of Sciences, Arts and Letters. 
Pupa. —Length, 7-8 mm. Width, 1.5 mm. The antennae 
are much longer than the body and are wrapped about the pos¬ 
terior portion of the same. Color in life light green. Dorsal 
spines, III, 2-4. 3. 4 + 16-20. 3-4. 3-4, VII. Each side 
of the first abdominal tergum bordered by a line of chitin end¬ 
ing posteriorly in a knob studded with short blunt spines: a pair 
of roughened or spiny patches on the posterior edge of the seg¬ 
ment may be seen within these knobs, when a cast skin is placed 
beneath a microscope. Two lines of chitin extend down both 
the dorsal and ventral sides of the abdomen. Lateral line al¬ 
most invisible. The gills could not be made out well in the 
cast skins on which I was forced to depend. They are small, 
as in the larva. The posterior end of the body is terminated 
by two chitinous appendages, with inturning hooked extremities; 
viewed laterally, the distal portion is seen to curve upward, as 
shown in the figure for the next species. Two small groups of 
hairs on the dorsal side of the last segment, point forward, evi¬ 
dently holding the coils of the antennae in place. The mandibles 
are moderately long, curved inward, serrate within: labmm 
very small, shorter than broad. 
Case. —Length, 7-9 mm. Width, anterior, 2 mm.; posterior, 
1 mm. A strongly curved conical case of rather fine sand, 
smooth in construction. There is a forward projection dorsally, 
forming a hood, so that when the oblique opening is closely ap¬ 
plied to the surface of a rock, the case meets the plane of the 
surface at an angle of about 45°. The posterior end is closed 
by a membrane with a single round or slightly elliptical open¬ 
ing at the dorsal edge. 
At the time of pupation the hood is extended forward and 
downward and the end of the case assumes a neatly rounded 
