warm his back. Here may be an example of weather influence. (T 51 At 1:50, weather unchanged, Rhody was still in his roost with no apparent intention of coming down, but when I talked to him, moved over to the porch of his house preparatory to sailing down if sufficient attractions were offered. I placed a white mouse on the sidewalk at my feet and down he came(at 1:53). After he had disposed of this he had no interest in worms. He even dodged those I tossed to him. The absence of the sun so late in the day (continuous absence) may xxx have been an important factor in his roosting so late. (This is the first time since Oct.30th., I believe, that the sun has not been shining at this time). Yet evidence on this point to date is decidedly contradictory. I left him at his post and returned to make the above record. 2:40. Weather unchanged. I found Rhody already back in his roost at 2:35. Therefore he was not out of it more than 42 min- utes, and probably less. Considering that it takes quite a long time for him to complete his passage through the ladder tree, it is evident that the impulse to return to his roost came not long after I fed him. November 29th. (Sunrise 7:04, sunset 4:51). The day began as a duplicate of yesterday, but about noon, began to clear. 12:30. Warm in the sun, so went down to see how the sun theory fits in with his getting up. It didn't. When I spoke to him in his roost about 12:20, he moved over to the porch of his house, and I thought he was going to come down; however, after a minute or two, he suddenly went back into the obscurity of his roost 2 or 3 feet away, and stayed there. This was new. While I was considering this unexpected angle two dogs appeared and sniffed at me. Soon three people, their owners. So that was it. I went away, returning in a half hour. He had not budged and his lookout place was sunny and warm. Another dog came and decided to stay with me. As his owner was not in sight I chased him away! Maybe Rhody would have come down if it had not been for the dogs. This made the test inconclusive. About 1:30 I took a peak at him and hurried away so as to influence his behavior as little as possible by my presence. At exactly 2 P.M. another peak and retreat showed him still there, but instead of staying on the job, he must have dropped down to the ground beneath the tree instead of sailing to the street for, at precisely 2:01 here he came marching out of the bushes to join me. He was not going to let me escape this time without paying tribute! I surrendered and gave him a big piece of hamburger, which he took unhesitatingly from my hand. (It is a curious fact that he rarely hesitates to take meat from hand, but often will take a living mouse only when I lay it down. His attitude toward me appears to differ according as I offer meat or mouse. I have wondered about this many times. Again, with meat, he usually retreats only a step or two, then swallows it, whereas with live mice, he retreats farther, often running away rapidly a dozen feet or more. It is as if his wild instincts were aroused at the sight of living prey--perhaps his "sporting" instinct).