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
The relative length of the legs is not constant; in one example it
was 4, 3, 1, 2, in the other 4, 1, 2, 3, 2 and 3 being very nearly
equal. Similar variations are also found in the legs of the female.
In regard to the nest of this species, researches made subsequently
to the publication of _Harvesting Ants and Trap-door Spiders_
have proved it to be of rather a different form from that there
represented; thus in the main tube, just before the inner door is
reached, there is a descending branch running off from the main
tube at the same angle as the ascending branch, but in an opposite
direction; in the older and larger nests the descending branch
becomes choked with débris; it is more distinct in the nests of the
younger spiders, and is always more or less distinctly traceable.
_N.B._--In the above details there have been only one or two special
distinctions observed between the two male examples examined. It
should however be noted that in one (the one captured behind a stone
wall) the ocular area was slightly narrower in proportion to its
length, and the interval between the eyes of each lateral pair rather
less.
_Habitat._ San Remo, Bordighera, Mentone, Cannes, and Hyères.
Nemesia Meridionalis, Plate XVII., fig. B, p. 215.
Syn. _Nemesia meridionalis_, Costa, _Fauna d. Regn. Napl. Arachn._,
p. 14, Pl. I., figs. 2, 3.
---- ---- Simon, _Aranéides nouv. ou peu connus du Midi de l'
Europe_, Mém. Liège, 1873 (separate copy), p. 21.
Adult male, length 6-3/4 lines (14 mm.), female adult, length 10-1/2
lines (22 mm.).
The examination of an adult example of each sex of this spider
received from M. Simon, by whom they were found in Corsica, leads
me to conclude that we have here the true _N. meridionalis_, Costa,
as certainly at least as it is possible at present to identify the
species by the insufficient description and figures given by this
author.
The _eyes_ appear to be less closely massed together than in _N.
Manderstjernæ_, but in other respects no particularly tangible
difference is to be noted; the interval however between the eyes of
each lateral pair is perhaps rather greater. Between the male and the
female of the present species there is a decided difference in the
relative position of the eyes. In the female the fore-centrals are
nearer together than each is to the fore-lateral on its side, while
in the male, the fore-centrals are wider apart than each is from its
fore-lateral. I have also noted a similar difference in regard to _N.
Manderstjernæ_. The fore-centrals are also smaller in the female than
in the male.
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