Four new species of Cerambycidae are described from Paraguay: Eraninatomentilla (Hemilophini); Mimasyngenesconcolor (Desmiphorini); Recchiadrechseli (Aerenicini); and Microibidionbimaculatum (Neoibidionini). The new species are included in known keys.
Keywords: Cerambycinae; Lamiinae; South America; key; taxonomy.