I sat by the edge of the pond, and was entertained by several pond skaters squabbling for a dead mirid bug.
Another smaller individual, also a male, crossed the pond rapidly. In a cursory view they do look remarkably like pond skaters, specially due to the pale fringe of the abdomen and the way they move on the water...
...but he crossed the pond again and I lost it too.
Then I spotted another one. This one looked quite shy and reluctant to move, and it sat hidden by the stems on the water edge.
It then become obvious why the white stripes, these are very similar to the reflections of the water on the edge of the pond, and probably help concealing the spider to their predators, and possibly their victims.