It is told the finding of Lymexylon navale L. (Col. Lymexylonidae) in Montseny mountains, exactly at Sta. Fe (1400m. Barcelona) in beechtree trunk (Fagus sylvatica). The presence of this xilophiles species in the Iberian Peninsula is to be added to the of Hvlecoetus dermestoides L., already noticed in our fauna. A little description of the species is made with graphic representation of maxillary palpi and the aedeagus.