The spider family Oecobiidae (also called Disc web spiders) consists of about 100 species.
They are rather small (about 2 mm); some of them build tiny webs close to the ceiling in people's homes. The first two pairs of legs point forward then curve backwards.
Huber, B.A. (1994): Spermophore morphology reveals a new synapomorphy of Oecobius and Uroctea (Araneae, Oecobiidae). Journal of Arachnology 22: 73-74. PDF