1179 the shop, through the yard and thence inside. In a half minute more or less, Rhody was at my feet picking up the young rat which I had accidentally dropped upon the floor. Then followed the usual ritual, including the mirror display, with slow march to nest l-36. For the last day or so this nest has regained its position of being the favored one. At 6 P.M. Rhody was still (or again) reposing in No.1-- the latest he has ever been seen there. I should think he would adopt it as a sleeping place. He certainly looks comfortable in it. At 7:30 P.M. he was not in the nest. May 5th. At 7:55 A.M. Rhody was found sitting in nest l-36, not having been heard to call in the meantime. An incident noted yesterday, but not recorded, illustrates Rhody's awareness of the dangerous character of honey bees. His fear of yellow-jackets has been commented upon previously. This incident also shows that he also is probably not guided by his sense of hearing alone in judging. He was carrying the last rat along a path when an old, decrepit honey-bee, evidently about finished, fell to earth directly in his path about 3 feet away and crawled feeblely. R immediately halted, then took a few steps toward the bee, stared at it, then made a semicircular detour about it of about 18 inches radius. He thus puts honey-bees and yellow-jackets in the same cat- egory. He may, of course, and probably did, hear the bee buzz while it was still in the air, but it did not buzz when on the ground. Rhody gets busy on 5-36 10:35 A.M. At 9:15 A.M. Rhody was no longer in nest No.1-36, but was discovered pulling twigs out from the mulching around the rhododendrons near the cage. These he carried up to nest 5-36, which is still almost "invisible". When it appeared that he really meant to work seriously I began to keep count of his additions to the nest. In the first 10 minutes during which he was under ob- seration he carried up 4. In 21 minutes he had added 10. I then began to time individual trips to the next nearest half min- ute, giving the following table: 11 in 24 minutes, 12 " 26 " 13 " 27 1/2 " 14 " 29 1/2 " I now began to time to the nearest 1/4 minute. 15 in 31 1/4 min. 16 " 33 1/2 " 17 " 35 1/4 " 18 " 37 1/4 " 19 " 39 1/2 " 20 " 42 " 21 " 45 1/2 " (He has to go farther now). I was sitting about 30 feet from the base of the tree. He was getting material 6 to 60 feet from me and about 10 to 40 feet from the tree. Some of it at the same level and some 5 to 10 feet lower. All twigs selected had one or more forks and ranged in