κεράμβυξ
From LSJ
ὃν οὐ τύπτει λόγος οὐδὲ ῥάβδος → if words don't get through, neither a beating will | if the carrot doesn't work, the stick will not work either | whom words do not strike, neither does the rod
English (LSJ)
υκος, ὁ,
A longicorn beetle, cerambyx, which feeds on dead wood, Nic.Fr.39, Hsch.
German (Pape)
[Seite 1419] υκος, ὁ, ein Käfer (κάραβος) mit langen Hörnern (κέρας), Feuerschröter, Hesych. Vgl. Ant. Lib. 22.