This is a giant among dwarfs. The Elateridae (click beetles) are easy recognised because of their special articulation between pro- and mesothorax which can get armed and then quickly released, that result in a jump of entire body when it falls with the dorsal surface down.
When the biggest one in Europe is about 2 cm length, this southern African giant acacia click beetle (Tetralobus flabellicornis (L., 1767)) measures 6 cm in length. Collectied in Zimbabwe, 14.04.2014 at light by Laszlo Rakosy whom I thank again.
fantastic!
Claudio