followed by him. He waited at the door for the young white rat I gave him, displayed as usual, wandered about aimlessly for several minutes, be thought himself of the mirror 50 yards or so away, entirely out of sight and to be reached only by a devious course, ran to it, displayed, wandered a few minutes more, then took the rat to 2-36. Thus, in the last 2 or 3 hours, he patronized three of the four nests, No. 3 being still disregarded. Young thrashers depart from norm. In one external respect both young thrashers differ from all of the others reared here, in that each has a "mane" 1¼ to 1½ inches in length and about ¼ inch high. "Roughneck" had ruffled feathers on his neck that, in no way, resembled these smooth, regular, sharp-crested manes. One of the youngsters (possibly both--I have not been able to determine as yet) differs in contour in two other respects also. His tail is notched (perhaps only temporarily) at the end, the middle rectrix, or perhaps the middle pair, being shorter than the laterals. Also his tail coverts are "swollen", so that, while his body outline tapers toward them, there is a swelling at the coverts, then a tapering off again to the rectrices. These three features make him look unthrasherlike. Both young birds' irides have changed from the very dark brown ("black") of the nest to Greenie's hue. 3:30. I find that only one of the young birds has the "swollen" tail coverts, but the tails of both are alike. To test Rhody's capacity for rats and mice, a small wild mouse was offered him about 5 P.M. He accepted it at once, but released it repeatedly following it about without attempting to kill it for several minutes. If it seemed about to escape, he picked it up by the skin, then laid it down again. Finally it was killed and abandoned. April 27th. Nest 2-36 was chosen by Rhody for the first rat. A second one given him at 5 P.M. was quickly killed and eaten on the spot, without any fancy business at all--the first time he has done this for some time. April 28th. Rhody continued to behave according to form, patronizing nests 1 and 2, the cage and the magpies as usual. The thrashers are busy and pretty quiet. The nest is never vacant. The youngsters are coming to me rather freely. B still feeds both. Occasional shadow-boxing. April 29th. Heavy rain from about 7 to 8 A.M., then clearing. A rattle-boo outside the dining room window announced Rhody's presence. When the window was opened he came in, leisurely, and looked about. (8:15). A young rat was accepted by him without display of any kind. He got it part way down, then rejected it.