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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 7


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 or, oftener, for only a part thereof. Near the free end of each
 cell is a peculiar small ovoid body which does not so closely re-
 semble a nucleus as the bodies just described as present under
 the chitinous layer' (Fig. 14). They are quite homogeneous,
 stain darker than the surrounding cytoplasm, but are not seen
 distinctly in all cells of this region. Towards the proximal
 end of the thin glandular part just before it widens to form
 the reservoir, a distinct change is noted in the structure of the
 wall. The epithelial cells of Lwhich it consists are here of the
 same length as those just described, but are much wider. The
 nucleus is also different here, and, instead of lying with its long
 axis parallel to the long axis of the cell, lies transversely across
 it; it is also bent with the convex surface towards the basal end
 of the cell. Along its other surface which is concave, lies a
 peculiar body, rounded in outline, of a dark homogeneous appear-
 ance, with a yet darker small central portion from which radiate
 a number of dark lines none of which reach the periphery (Fig.
 17). Similar cells have been described in many glandular tis-
 sues of insects by Dierckx (3), G-lison (5), and in the reproduc-
 tive organs of the Orthoptera by Fenard (4). From the dark
 central portion of this body a duct passes into the lumen of
 the gland penetrating the chitinous layer which is here present
 as in other parts of the gland.
 The wide proximal part of the gland has become a reservoir
 to hold the secretion of the other parts. Internally there is a
 chitinous layer much wider than in the glandular part, and very
 much folded. The epithelial layer has undoubtedly become
 functionless, and is represented by a thin layer of cytoplasm,
 without cell boundaries, in which are scattered a number of
 ovoid- nuclei here much smaller than in any other portion of
 the gland. There is an outer layer of longitudinal muscles
 which is not present in other parts of the gland.
 Vagina.-Tbe vagina is a continuation of the oviductus com-
 munis from which it differs, externally, only in its slightly
 greater width. Near its distal margin, along the dorsal walt,
 it bears a saccular evagination which receives the duct from the
 receptaculum seminis; nearly opposite to this the ductus sem-
inalis opens.
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