Harvesting Ants and Trap-Door Spiders: Notes and Observations on Their Habits and DwellingsMoggridge, John Traherne
Science
Harvesting Ants and Trap-Door Spiders: Notes and Observations on Their Habits and Dwellings
Moggridge, John Traherne
Ants; Trap-door spiders
M. Thorell, in the introduction to his work _On European
Spiders_,[100] gives a detailed account of a method by which
specimens may be prepared for mounting in cabinets, by drying them
within a glass tube held over a flame, but it would appear that, for
purposes of study, specimens preserved in spirit of wine are far
preferable.
[Footnote 100: Thorell (T.), On European Spiders, in Nova Acta Regiæ
Societ. Scientiar. Upsaliensis, ser. 3, vol. viii. fasc. I. et II.
(Upsala, 1871).]
It is very desirable to obtain characteristic portions of, or
if possible entire nests, but where the tubes are long, this is
extremely difficult to do satisfactorily.
Some nests, preserved in the British Museum, have been coated with
thin glue, and this appears to be of some use in binding the parts
together. I find that by stuffing the tube full of cotton-wool,
before attempting to remove the earth, the nest may sometimes be
obtained in tolerably good condition.
E.
_The Nest of the Tarantula (Lycosa Tarentula)._
As it is of some interest to compare the burrow of the Tarantula
with the nest of its near allies the trap-door spiders, I give the
following _résumé_ of M. Dufour's observations:[101]--
[Footnote 101: Quoted by M. Lucas, in his Histoire Nat. des Animaux
Crustacés et Arachnides, p. 357.]
"_Lycosa Tarentula_ forms a cylindrical burrow in the earth, often
more than a foot long, and about one inch in diameter. At about four
or five inches below the surface the perpendicular tube is bent
horizontally, and it is at this angle that the Tarantula watches for
the approach of enemies or prey.
"The external orifice of the burrow of the Tarantula is ordinarily
surmounted by a separately constructed tube, and which authors have
not hitherto mentioned; this tube, a true piece of architecture,
rises to about an inch above the surface of the ground, and is
sometimes as much as two inches in diameter, being thus larger than
the burrow itself. This tube is principally composed of fragments
of wood fastened together with clayey earth, and so artistically
disposed one above the other that they form a scaffolding having
the shape of an upright column, of which the interior is a hollow
cylinder."
M. Dufour observes, however, that the exterior tube was not found in
all the nests. In every case the tube was lined with silk throughout
its whole length.
F.
The following description is that given by Prof. Ausserer in his
monograph of _Territelariæ_,[102] of a male trap-door spider
which was found at Nice, and named by Herr L. Koch _Nemesia
Manderstjernæ_. It is just possible, I think, that this male may in
reality belong to _N. meridionalis_ [Costa-Cambr.], of which the
female alone is at present known.[103] If this is the case, then the
name _Manderstjernæ_ will have to be suppressed in favour of that of
_meridionalis_. If not, we have yet to discover the female spider and
nest of another species of _Nemesia_!
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