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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 [1]


THE REPRODUCTIVE ORGANS OF THE FEMALE MAIA
             MOTH, Hemileuca Maia (Drury).
                  BY WM. S. MARSHALL.
  Hemilevuca maia is found late in the summer near Madison
ecc-urring---ver-y abundantly-in -the--m-arsh--la-nd---t---the---m-argin--o-
one of the lakes adjacent to the city. Here for a few days both
the males and females fly low over the marsh or settle on the
grass and small twigs, the latter to lay their eggs. One year a
number of the moths were collected and saved for study; some
were prepared by having the body cut open before throwing them
into alcohol, while from others the reproductive organs were re-
moved and hardened in corrosive sublimate or Fiemming '
solution.
  The reproducitve organs of the female moth are, in general,
similar to those which have been described for other Lepidoptera.
Each ovary consists of four long ovarian tubules all of which
are bent and coiled forming a large irregular mass within the
abdomen. When the tubules are separated from   each other
each one is seen to be a long tube having the same diameter
throughout, except for a short distance, at the distal end, where
it is narrower (Fig. 4.) Those moths from which the eggs have
been expelled show the ovarian tubules shorter and much nar-
rower. The eggs within the tubules, which, before egg-laying
generally exceed forty in number, give to each tubule the appear-
ance of a string of beads. After the expulsion of part of the
eggs there are here and there in the tubule considerable distances
between neighboring eggs, no regularity, however, being apparent
 W, , f-
I


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