Trying to figure out just what's going on here. There are two individuals making use of this nesting tube. One is definitely Trypoxylon. The other may be, too, but I'm not sure. In the first image, the legs of the unknown individual are visible inside the tube as the Trypoxylon peers in. The second image shows the abdomen of the unknown individual beneath the Trypoxylon. The third image shows the face of the unknown individual as it pushes out past the Trypoxylon. Any insights (or guesses) as to what's happening will be much appreciated.