Description of Cantharis navka sp. n. (Coleoptera: Cantharidae), a third species of the genus from Rovno amber

A new extinct species of a soldier beetle, Cantharis navka sp. n. (Cantharidae: Cantharinae), from the late Eocene Rovno amber, is described. This is the third member of the genus registered in Rovno amber, compared to eleven species of Cantharis Linnaeus, 1758, known from Baltic amber. The possible use of the length ratio of antennomeres 2 and 3 for separation of the fossil species of Cantharis is briefly discussed.