Parasitic Wood Wasp (Orussus) ovipositing

Usually Orussus dashes back and forth along logs, occasionally taking flight suddenly. This makes photography difficult.
On May 14, 2010, at Port Williams beach in Sequim, WA.—see Orussus main page for description of locale—I saw two females holding still on old beach logs above high tide. I took both photos and movies. On inspecting the photos and movies at home, I realized that these two females had been ovipositing. In the photos and video, the characteristic swollen antenna tips of females are visible.

1 and 2 show female 1 with her ovipositor inserted in a tiny crack in the log. Image 2 is a zoomed closeup. The ovipositor is to the right of the abdomen tip in these images. The QuickTime movie (3) shows her poking around and inserting her ovipositor.

4, 5 and 6 show female 2. In image 4 and the zoomed closeup (5), her ovipositor is above the log surface. In this image, she’s lowered her body to insert the ovipositor. The QuickTime movie (6) shows female 2 poking around, then inserting her ovipositor.
Oviposition site of female 2
Oviposition site of female 2 measured Note that the sand-filled hole near where she oviposited is smaller than the holes Orussus hides in.