or 
xlii 
exposed, and formed in the folds and interstices of the rough 
bark (‘Annals and Magazine,’ J. ¢., pl. x., fig. A),—the outer side 
of the lid, like that of the exposed parts of the tube, exactly 
resembling the surrounding surface of the bark.” One of these 
tubes was ‘‘ constructed in the channelled groove of a piece of 
wood which had apparently formed part of some building” (l. ¢., 
fig. B). 
Other nests somewhat similar to those referred to by Mr. 
Pickard Cambridge were exhibited by M. Lucas at a meeting of 
the French Entomological Society (Noy. 10); the silken tubes— 
carefully concealed by, and interwoven with, particles of bark— 
constituting a longitudinal distension above the surface and ceding 
to pressure. No reference, however, has been made in any of 
these descriptions to tubes entirely hidden within the solid bark, 
having only the lid exposed. 
From the occupants of these novel abodes being destitute of 
the spines with which the anterior extremity of the falces is 
crested in allied races, assisting them to burrow in the earth, 
Mr. Pickard Cambridge considers that these spiders, “ not being 
furnished with the necessary implements,” fix ‘‘ upon a position 
where excavation is needless.” But in the other instances referred 
to, where the tunnel is equally short, scarcely penetrating beyond 
an inch, and not corresponding therefore with that of any wood- 
boring larva of similar dimenstons, the fortuitous discovery of 
such a retreat would seem open to question; the fangs being 
possibly more available than the spines on the falces for operating 
upon the fibrous tissues, and an economy of labour being effected 
by utilising any convenient receptacle, as frequently witnessed 
among other excavators. 
Some doubts have been entertained whether the access to these 
domiciles is from above or from below. Mr. Pickard Cambridge 
now inclines to the opinion that the hd is placed at the upper 
extremity of the tube as usual, although evidence is wanting upon 
this point. 
An instructive account of the habits of this and other allied 
species, comprising also the preliminary details published in 
the ‘Field,’ has been given in ‘Newman’s Entomologist’ for 
November last by the talented Editor of that periodical. 
