Up on Patrol with 4 other a/c, flying as tail end charlie spotted a blue colored e/a. Tried to alert the Flight, but no go. Since I was so far back anyway, I did a loner and played tag with a 2 Seat. While making my last run , I emptied my last ammo drum at him, and Heard that awful Ripping sound The Fabric was tearing off my wing. Leveled off, down power, and very gently headed for a long road to land on.