When trout are repeatedly rising for flies, my Floating Menace is the pattern to try.
Tied parachute style, this fly is absolutely deadly when fish are feeding on insects trapped in the surface. The thing that sets parachute flies apart is the way the hackle is tied around a wing post, which sits upright at 90 degrees to the hook shank. The red post also acts as a point to watch in order to keep an eye on strikes.