Supplement to Harvesting Ants and Trap-Door SpidersMoggridge, John Traherne
Science
Supplement to Harvesting Ants and Trap-Door Spiders
Moggridge, John Traherne
Ants; Trap-door spiders
M. Simon says that this species of _Atypus_ is common in all the
centre, east and west of France, and that he has detected it in
great abundance in the neighbourhood of Troyes, in Champagne, in the
month of October, when the male was inhabiting the same tube with
the female.[125] I am greatly indebted to M. Simon for having given
me the specimen of a silk tube taken entire from a nest found in
this locality, which I have figured in Plate XIII., fig. A. It will
be seen that the tube has collapsed, but one may still trace the
enlargement near the base which forms the chamber, the elbow where it
is bent at the surface of the ground, the moss, scales, and fibres
of plants which are woven into, and serve to conceal the aërial
portion, and its termination in a twisted and apparently-closed mouth.
[Footnote 125: M. Simon has discovered another species of _Atypus_ at
Digne in the Basses Alpes which constructs a similar nest to that
described above. This species was detected for the first time by M.
Simon and described by him under the name of _Atypus bleodonticus_.]
Indeed, I believe that, in this specimen, the upper extremity of the
tube is really closed, for, when I succeeded in inflating this aërial
portion, the lips did not part, but remained drawn together.
It seems very extraordinary that the mouth of the tube should be thus
closed, so that the female spider becomes a prisoner, self-immured,
and I can only suppose that this is a temporary condition, limited
perhaps to the period during which she receives the visits of the
male.
At the very base of the tube I found a mass of earth, roots and
vegetable fibres, and in this I hoped to have detected the _débris_
of insects or other food, such as I sometimes find at the bottom of
and below the tubes of the trap-door nests in the South, but of this
there was no trace.
It is difficult to me to imagine how the spider could contrive to
live by the capture of worms, after the fashion suggested by M.
Simon; for who does not know the speed with which, on the slightest
alarm, worms draw back into their holes and escape pursuit, and the
muscular power which they exert in resisting any attempts to drag
them out of the earth?
M. Simon's account of the closed tube and capture of worms by this
spider corresponds, however, with that given by Mr. Joshua Brown, the
first discoverer of _Atypus_ in England.
This gentleman communicated his discovery to Mr. Edward Newman[126]
in 1856, since which time (with the exception of M. Simon's paper
quoted above) little or nothing seems to have been done to clear up
the points which remain doubtful in the history of these singular
creatures.
[Footnote 126: Note on _Atypus Sulzeri_ of Latreille, by Mr.
Edward Newman, read before the Linnean Society; a report of this
communication is given in _The Zoologist_, vol. xiv. (1856), p. 5021.]
Public-domain text, read in full here on John Shaqi.
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