ed under a baccharis bush 15 feet north of the north fence, on his route to 2-36 tree. He was in one of his wooden, semi-frozen states, in which he will not respond to advances, ignores worms and appears mentally absent. In about 20 minutes he thawed somewhat, crawled out and began to sun his back. He would now catch worms provided he did not have to reach more than a couple of inches for them. I went back over the fence and watched him from the south side. In a few minutes he hrooded softly, looked about and began to wrestle with weed [illegible] stalks and look toward nest 2-36 when he had a billful. I wish to "wean" him from that nest (without using compulsion). I now tried, by talking to him and showing him the red box) to get him to come home; rather to my surprise, he dropped the twigs and came over via the roof of the cage. I now tried to get him to come inside and take a mouse, but he preferred to go back to work on the nest in the glass house. That was something accomplished, even if not the direct objective. He worked on the nest conscientiously for 35 minutes, then retired to the glade for a well earned rest. This was followed by more work on the same nest, then a rest. At 11:50 I went out and found him at the nest again. About 12 o'clock he came to the cage where I was sitting. The time now seem d ripe to make the Great Experiment: Rhody apparently in re- ceptive mood, Pepper, mouseless, and occasionally looking into his can for the one I had removed. Rhody and Pepper in the Cage Together. I opened the cage door and put a mouse on the ground. Rhody came in promptly, took it wnd began his ritual, bowing toward various points of the compass and showing no desire to leave the cage. R5 was up in the upper portion of the inner cage watching. R, with raised crest and colors displayed, began to march about saying: Cut, cut...... cut rapidly. He went into the upper cage, bowed, hrooded, tail-wagged. He went up and sat on the perch with Pepper, who had not retreated. They were about one foot apart. Pepper immediately lowered his head below the level of his feet and kept up a continuous crying, shaking his head sideways. (Here is the first definite observation at this place of one road- runner addressing another with this cry). Rhody stood erect, not offering the mouse to R5, making no sound and no display. (I was now in there myself as a member of the party). This lasted for perhaps two minutes, then R5 moved into his armchair, which is at the level of the roost and close to it, lay down in sleeping post- ure, tail up against the back, and continued his crying and side- wise head shaking (almost a tremble). R moved over and faced him, still voiceless and without display, and not directly offering the mouse. (When he had his brood in the nest, he sometimes held a mouse or a lizard in the same way, waiting for the youngsters to reach up for it; consequently it can not be said with strict ac- curacy that the mouse was not offered). Rhody now gobbled the mouse himself "right in R5's face". I looked for fireworks, but there were none. Rhody now began to look around at his immediate surroundings as if looking for a nest site. R5 now came down to the ground when I showed him a mouse and took it fearlessly. There appeared to be no atmosphere of re- straint between the two birds nor, on the other hand, was there any evident attraction at this time. R5, after eating his mouse, got up and joined Rhody in the upper annex. Their relations seem- ed entirely indifferent. R liked it up there and settled for a short rest. R5 came down to the shelf at the S.W. corner of the