Lewis Short
concursātor (noun M) : id.
* One who runs hither and thither; in milit. lang., a skirmisher (opp. statarius; rare, perh. only in Livy): concursator et vagus pedes,Liv. 31, 35, 6: levis et concursator hostis,id. 27, 18, 14.
Charlton T. Lewis, Charles Short, A Latin Dictionary