Not so easy to say because intermediate size and entirely reddish legs and antennae.. It must be a big male of Dorcadion (Cribridorcadion) cinerarium panticapaeum Plavilstshikov, 1951 from this locality but red antennae shouldn't be the case, 1-st joint only. Second idea as small male of D. sericatum C. R. Sahlberg, 1823, but I don`t know if he lives in the Kertch environs.