Prof. Ausserer[89] has enumerated 215 species of Territelariæ as having been found in the world at large, but of this large number ten only, as far as I have been able to learn, have been described in connexion with their nests, and eight of these belong to the Mediterranean region.[90] To these we may now add two more, namely, Nemesia meridionalis, with its branched double-door nest, and N. Eleanora the builder of the unbranched double-door nest, thus making twelve in all.
[89] In his monograph of Territelariæ quoted above.
[90] I use this term in its widest sense, making it even include Morocco. A list of the species known to inhabit this region will be found in [Appendix C].
Three of the twelve, however, Atypus piceus, A. Blackwallii, and Nemesia cellicola,[91] do not appear to build true trap-doors, but only a simple silk tube without any covering at the mouth.
[91] See [Appendix A, p. 141].
The following tabular view will show to which of the four types of trap-door nest those of the remaining nine spiders belong, and their geographical distribution:—
TRAP-DOOR SPIDERS WHICH BUILD
Nests of the cork type.
Idiops syriacus, Beirût.