Lewis & Short

strufertārĭi, ōrum, m., they who make offerings near a tree that has been struck by lightning: strufertarios dicebant, qui quaedam sacrificia ad arbores fulguritas faciebant, a ferto scilicet, quodam sacrificii genere, Fest. p. 295 Müll.; cf. id. s. v. ferctum, p. 85.