Thanks for the ID guys -- I've heard and read about hex hatches and can only imagine what it must be like to have thousands of these things fluttering around. What a feast for the fish!
I looked up "mayfly" on wikipedia and it mentions that Lake Erie had an emergence of one species of hexagenia that was so massive it showed up on the doppler weather radar!
The farther you can cast, the easier it is for a fish to take you into your backing. I seldom see my backing . . .