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Skinner, Ernest B. (ed.) / Transactions of the Wisconsin Academy of Sciences, Arts and Letters
volume XV, Part I (1904)

Marshall, Wm. S.
The reproductive organs of the female maia moth, Hemileuca maia (Drury),   pp. [1]-Plate II ff. PDF (3.9 MB)


Page 2


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 flltileuca is without the vesi-
cular swelling present in so many Lepidoptera. The recepta-
culum 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 coilunion 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
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