Twenty one species of Alysiinae are reported from the Vall d'Aran (Lleida), 17 of which are new records for that province. Some biological data obtained during the collection are included. (The following new records are discussed: Alloea contracta, Alysia manducator, Aphaereta difficilis, A. minuta, Dapsilarthra florimela, Pentapleura pumilio, Prosapha speculum, Chaenusa conjugens, Chorebus agraules, C. bathyzonus, C. misellus, C. petiolatus, C. senilis, Dacnusa sibirica, Exotela flavicoxa, Protodacnusa tristis.)