This
gregarious habit, in so typical a genus as Epeira, among
insects, which are so bloodthirsty and solitary that even
the two sexes attack each other, is a very singular fact.
In a lofty valley of the Cordillera, near Mendoza, I found
another spider with a singularly-formed web. Strong lines
radiated in a vertical plane from a common centre, where the
insect had its station; but only two of the rays were connected
by a symmetrical mesh-work; so that the net, instead of being,
as is generally the case, circular, consisted of a wedge-shaped
segment. All the webs were similarly constructed.
[1] Venda, the Portuguese name for an inn.
[2] Annales des Sciences Naturelles for 1833.
[3] I have described and named these species in the Annals of
Nat. Hist., vol. xiv. p. 241.
[4] I am greatly indebted to Mr. Waterhouse for his kindness
in naming for me this and many other insects, and giving me
much valuable assistance.
[5] Kirby's Entomology, vol. ii. p. 317.
[6] Mr. Doubleday has lately described (before the Entomological
Society, March 3rd, 1845) a peculiar structure in the wings
of this butterfly, which seems to be the means of its making
its noise.
