6 Wisconsin Academy of Sciences, Arts, and Letters. 
imal part of the copulatory pouch a narrow tube 1 mm. in length 
leads into the vagina, opening opposite the duct from the re- 
ceptaculum seminis. 
Cement glands .—The cement glands are two long gradually 
tapering, tubular parts, very thin distally, but soon beginning 
to increase in diameter; the proximal part is much larger, this 
enlarged portion, the reservoir, being about one-quarter of the 
entire length. Each gland is 30mm. in length, the two uniting, 
as is common in Lepidoptera, in a common duct 2mm. long, which 
empties dorsal ly into the vagina 1mm. anterior to its proximal 
end and almost opposite, but a little posterior to, the opening 
of the receptaculum seminis. The entire thinner glandular por¬ 
tions lie in a twisted mass at the right side in the posterior part 
of the abdomen. The larger reservoir is generally dorsal to 
the vagina. 
Sections through the gland at any place in the distal third 
show the wall to consist of a layer of epithelial cells, each ceil 
long and narrow, containing an elongated nucleus in the basal 
half and a number of small vacuoles scattered throughout the 
cytoplasm. Over the free ends of these celis is a loose chitinous 
layer which in the sections appears wavy. Scattered just under¬ 
neath this chitinous layer were a number of small nuclear-like 
bodies, many of which were elongated and nearly tubular (Fig. 
14). Seen in a surface view the chitin appears marked off into 
small irregular spaces each one of which contains one of these 
nuclear-like bodies (Fig. 15). The chitinous layer covering this 
part of the cement gland is a continuation of the same layer 
which is found to cover the inner surface of the gland through¬ 
out its entire length. The nuclear-like bodies appear detached 
from the epithelial cells, and attached to the chitinous. layer, 
but this might easily be due to poor preservation of the tissue 
and not normal. 
Fig. 16 shows a section cut nearer the proximal end, although 
still in the narrow part of the gland, and we notice that the 
very narrow cells just described are replaced by wider ones 
which are somewhat pointed at their free ends and may be 
separated from each other either throughout their entire length 
