I could follow the action most of the time. Most of it consisted in dodging in and out of the bushes on the ground, B constantly trying to keep on the opposite side of a bush from his mate. Yet when it was B singing on a high point, he would locate her by hearing her response, and dive down to her, when the pursuit would again be taken up by her. G used the ka-dah of the hen frequently in her full song. It was harsher than B's rendition and therefore a closer imitation. Neither bird went near the nest, and when I left, the action still continued. I suppose this is all preliminary to egg laying, but I am surpris ed to find the female the aggressor. 1:30 P.M. The chase was still on. G detached herself from the vortex long enough for a worm, but B was too anxious to keep away from G. 5:25 P.M. Throughout the whole afternoon the chase continued, though at about 3, B had eluded his mate long enough to come and get some worms. When she arrived they were off again, but less strenuous- ly. It began to degenerate into something that looked more like tagging, though B would not permit his mate to get on the same side of a bush with him or nearer than about 3 feet, if he could help it. At times they would rest 5 to 10 feet apart in my vicinity and talk, using phrases that were mostly new to me. There was a little singing by both birds, soft in character. For the first time I heard the Vigors wren imitated, by G, and B produced the Chickadee-like call of the Plain Titmouse, also for the first time. These were repeated. At this time they were sitting about 8 feet from me and 6 feet apart in rose bushes, but when Brownie saw his mate about to come over to him, he departed abruptly, followed by her. It was not until about 5:10 that Brownie would come for worms in sight of his mate. By this time they had calmed down considerably and they came to me alternately, but Brownie still watchful of his