8:16. Cleaned abdomen. 8:17. Crawled on top or back side of nest again and stayed there. Cleaned wings and abdomen. 8:18. Explored top. Cleaned front legs and antennæ. 8:19. Stood still. Occasional movement of head, antennæ or abdomen. 8:20. Same as 8:19. 8:21. Began to explore again, becoming quite lively. Antennæ constantly waving. 8:22. Same as 8:21, but extended its travels to the under (cell) side of the nest. 8:23. Left the nest entirely and began to walk around the surface of the desk. 8:24. Started to climb a bottle that was some six inches from the nest. Antennæ still waving. 8:25. On the neck of the bottle, two inches above the surface of the desk. Cleaned front legs and antennæ. 8:26. Quiet except that it spread its wings once. 8:27. Still on neck of bottle. Moved its head and antennæ back and forth. 8:28. Slight change in position. Antennæ were still waving. Rubbed its wings, spread them, and then rubbed them again. 8:29. Rubbed its hind legs together vigorously. 8:30. Spread wings once, then rubbed them and the abdomen with the hind legs. Rubbed the hind legs together, and finally rubbed the right wings vigorously. 8:31. Moved around some, occasionally stopping to rub the right wings. 8:32. Explored the neck of the bottle. 8:33. Same as 8:32. Cleaned antennæ. 8:34. Same as 8:33. 8:35. Stood still but continued to clean antennæ and front legs. 8:36. Climbed up and explored the cork of the bottle. 8:37-8:40. Stood still on the cork, occasionally moving its jaws. At 8:40 the nest was placed against the cork and the wasp immediately crawled onto it, but seemed restless. As the nest has a faint, but distinct, odor of honey, it was probably attracted to it through the sense of smell. The next morning the specimen was nowhere in sight, but forty-eight hours later it fell out of a loose-leaf binder that had been lying on the desk. It seemed to be as active as when seen two days before. Some time during the second night after the appearance of the first specimen, that is, when it was some thirty hours old, a second individual emerged. This one was discovered on a pile of books two feet from the nest where it had evidently crawled soon after emerging.