On some new or rare spider species from Lesbos , Greece ( Araneae : Agelenidae , Amaurobiidae , Corinnidae , Gnaphosidae , Liocranidae )

In this paper, three new spider species are described from the Greek Aegean island Lesbos: Tegenaria maelfaiti sp. nov. (Agelenidae), Amaurobius lesbius sp. nov. (Amaurobiidae) and Agroeca parva sp. nov. (Liocranidae), as well as the unknown male of Arabelia pheidoleicomes Bosselaers, 2009 (Corinnidae). Diagnostic features and notes on ecology and distribution of these species are given. Two new records for the island are provided, such that currently 300 spider species are known from Lesbos.

added 61 spider species to the Greek fauna. The spiders of the island Lesbos were recently surveyed by a group of Belgian arachnologists during several collecting trips (October 2007, March-April 2008, May-June 2008. This resulted in a catalogue of 292 species, some of them new to science. Among these, VAN KEER & BOSMANS (2009) described four new dysderid species. The current paper provides the description of three more new species, belonging to the families Agelenidae, Amaurobiidae and Liocranidae and the description of the unknown male of another liocranid genus.

Material and Methods
The material treated in this paper was collected by members of the Belgian Arachnological Society ARAB EL during several trips to Lesbos, as detailed in BOSMANS et al. (2009). Specimens were examined and illustrated using a Wild M5 stereomicroscope. Further details were studied using an Olympus CH-2 stereoscopic microscope with a drawing tube.
Structures of the left palpus are depicted. All morphological measurements are given in millime- Robert      Ecology: Males were collected in March and April, females in March, April and June. It was mainly found in forest (pine, chestnut and plane forests), but also in shrubs and olive groves and along rivulets.
Distribution: Only known from Lesbos. As Tegenaria species tend towards small distribution areas, this species is possibly endemic to the island.

Family Amaurobiidae
Genus Amaurobius C. L. Koch The genus Amaurobius currently includes 67 species (PLATNICK 2010) and has a mainly Holarctic distribution. In Greece, it has been thoroughly studied by Thaler 5c Knoflach (1991,1993,1995,1998,2002) and WUNDERLICH (1995 Epigyne and vulva (Figs. 9-10): With reversed tra- New and rare spiders from Lesbos Diagnosis: Agroeca parva sp. nov. is recognised by its small size and its contrasting colour. The male palp and female epigyne suggest the species is closely related to Agroeca annulipes Simon, 1878 and A. maghrebensis Bosmans, 1999, both from the western Mediterranean. Males differ by the truncate palpal tibial apophysis, more pointed in the species from the Maghreb, females by the concave lateral margins of the epigynal depression, straight in the species from the Maghreb.

Description
Colour: Prosoma yellowish brown with narrow margin and submedian stripe greyish black.

Figures
Agroeca parva sp. nov. 1 1 .Male palp, lateral view;  Additional species belonging to the spider family Linyphiidae will be described in a further paper.
Finally, some species were discovered that remain unidentified to species level, for different reasons.
Sometimes, only one sex was captured, sometimes the genus is in need of revision or the systematic position is unclear. Further investigations are necessary to solve these problems. The description of these species can only be carried out after revisions of the relevant genera or after the discovery of the corresponding sex.