2 Wisconsin Academy of Sciences, Arts, and Letters. 
in this respect; such spaces in the tubules being found inde¬ 
pendently in each one, and all showing slight differences. The 
four ovarian tubules of each ovary meet to form a short oviduct 
and the two oviducts join near the median line of the body to 
form a wide oviductus communis. This passes towards the 
posterior end of the body soon, however, enlarging to form the 
vagina into which open the bursa copulatrix, dorsally, and the 
receptaculum seminis on its ventral surface. The vagina has 
dorsally at its distal end an enlarged saccular evagination or 
pouch into the apex of which the tube from the receptaculum 
seminis opens. The bursa copulatrix, a pyriform sac, is situ¬ 
ated on the left side of the body. It communicates with the 
exterior through the ostium bursae, ventrally on the eighth ab¬ 
dominal segment, and with the vagina through a narrow tube, 
the doctus seminalis, which in Tlemileuca is without the vesi¬ 
cular swelling present in so many Lepidoptera. The recepta- 
eulum seminis, generally on the left side of the body, is double, 
consisting of a large rounded part and of a second smaller more 
tubular piece which, near its distal end, bears a narrow, tubular 
appendix. The cement or sebaceous glands, glandulae sebaceae, 
two long narrow tubes, lie in the right side of the body where 
they form a bent and coiled mass. The proximal part of each 
gland enlarges to form a reservoir, these two parts then uniting 
and emptying by a common duct into the vagina. As already 
mentioned, the glands lie in the right side of the body, but the 
enlarged portions are dorsal in position, just above the vagina. 
The intestine is entirely functionless, the moths taking no food; 
it is a long narrow tube which, near its posterior end, becomes 
much enlarged to form the rectum on the distal end of which 
is a large saccular outgrowth. 
A ventral view of the eighth abdominal segment discloses a 
large genital plate the shape of which is shown in (Fig. 3). 
This plate extends from near the middle of this segment to its 
anterior margin, where, in the median line, is the ostium bursae. 
The same figure shows the opening of the vagina on the ventral 
surface of the ninth segment. 
Ovary. Each of the two ovaries is made up of four ovarian 
