upon Kack, the hen, as determined by observing that he follows he movements by turning his head to watch her especially. On the tenth, up to 4 P.M. (when I left for the afternoon) he was constant- ly in and out of the cage, spending, I should say, at least half o f the time inside. This appears to be a case of a male bird of one species recognizing "femaleness" in a bird of another species. It should be stated that the male magpie does not give this call at all. Rhody, on two more occasions was seen to shed soft feathers and again it looks as if the moult had begun. In the past four years Rhody had been seen to make "tasting" movements of bill and tongue many times and on occasions when the circumstances connected with the act would seem to have called for the bringing into action of the sense of taste. Occasionally a worm is dug up during gardening operations that looks like a rather large meal-worm. One of these was given him and he picked it up only to lay it down quickly and begin "tasting" and trying to get rid of the taste--"smacking his lips" and wiping his bill on the ground and surroundings, shaking his head slightly, abandoning the worm for good and all. During this period he was heard to give his song once only. He continued his display with mice, but seldom took them to the mir- ror. Sometimes they were taken to this roof and the Scamells'. Once his wooh, wooh, wo-o-o-o was heard coming from the fireplace behind me and he was found sitting on the chimney top. His tendency to look me up when he wanted a mouse increased. April 11th. (Sunrise 5:42, sunset 6:41). (Note written at 2:15 P.M.). At 7:15 Rhody was in his nest l-38 and up till now has centered practically all of his attention on it and on things connected with it. He has visited the magpies only once, but he has had two episodes with Neo, has sat in his nest for perhaps three quarters of the time and has done more work on it than has been observed in the week preceding. Today it is "all nest". Yesterday it was "all magpie". He seems today to have regarded his nest as something which now requires him, if not actually in it or working on it, at least to stay near. His work has been confined to adding lining material; once for the first time observed, taking up a piece of cotton batting as large as my hand. About 10 A.M. I was standing near the nest tree with Rhody at a higher level almost at my elbow, when he saw Neo coming toward me for worms. He crouched fully extended upon the ground like a cat and suddenly made a dash at Neo, who fled, rapidly being overtaken by Rhody. Neo had no chance in straight forward flight (running) and dodged into the bushes where Rhody followed and there was a whirling vortex for a few moments, Neo successfully evading the road- runner by superiority in dodging and doubling. Naturally I put a stop to this. Rhody returned to his nest and Neo, after a few min- utes came to me for worms. A half hour later I was sitting near the thrasher nest giving Neo worms and Rhody came. Neo flew up into a tree and suddenly drop- ed down on to Rhody's back and off again, R starting to run at first but turning quickly upon Neo and chasing him as before. This time both birds took to the air and went over the fence, then came back again, Neo having the superior agility on the short turns and through the bushes. I stopped this also. Rhody returned to his nest. A little later he picked up some rope yarn that I have dis- tributed for the birds, but dropped it and began tasting again. This rope had been slightly tarred on the outside, but I had used only