that A and T are of the same or opposite sex? I have applied bismuth formic iodide to Terry's injury with a camel's-hair brush, having found in the last few days that this compound had promoted healing of the original wound. After dark it is not necessary to put him under restraint in the slightest when applying this material; he does not attempt to avoid the application. Both young roadrunners are easily handled after dark, but the magpies, I find, fly about frantically if approached with a light, although they seem to direct their movements accurately. March 15th. Due to the early application of the bismuth compound, there was no thick blood-clot on Terry's bill this morning. Both young birds whined persistently when they saw me ap-r proaching the cage at 7:30 A.M. Archie, on a perch, stretched his neck so far downward that his neck, back and tail were practically in a vertical, straight line. A peculiar, but typical gesture. I went to see if Rhody was up at a little before 8. He was, and on my way back to the house along the street, found him on the sidewalk, cooing. He behaved according to seasonal form all day: calling, searching , working on his nest and visiting the cage. In the aggregate he must have spent nearly two hours at the cage where I was working most of the day. Perhaps only a quarter of this time was devoted to the young birds. On his last visit--more than an hour--he found a comfortable shady spot on the roof where he could watch the magpies, Archie and Terry and two of us building the extension. Roadrunners may be solitary birds, but Rhody certainly likes company. On an occasion like this he does not mind the hammering and moving of things about within a few feet of him and looks bright and interested, and it is not necessary to restrain ones actions for fear of alarming him. He is getting tamer than ever and, this afternoon, at one time there were eight of us at the cage at once, yet he did not leave. As recorded in these notes, I discovered some time ago that Archie is as good at catching worms on the fly as Rhody. Today it occurred to me to try Terry and I find he is just as good as the others. As an experiment I held a worm about 2 inches above his bill (which he was holding horizontally) and dropped it. He catched it as it was passing the tip of his bill, lowering his head slightly in the act. Say he lowered it an inch. Then the time interval between his perceiving the worm and catching it was of the order of one eighth of a second. In the afternoon the new 9' x 12' extension of the cage (see cross-hatched addition to sketch on p.1003, marked DEFG)+was far enough along to permit of A and T being allowed to enter, the wire netting along DE, being entirely removed. Along this line there has grown up a hedge-like row of baccharis, mimulus, etc., self seeded. This has been kept down to a height of about 18 inches. Archie and Terry have been accustomed to this hedge as marking the limit of territory available to them, since it coin- cided in position with the netting. They have a regular path along it, through doors 2 and 3, into cage B, turning there and coming out again. This hedge they often inspect for insects, but know only the cage side of it, although, by craning their necks, they frequently view the outside world over its top. When the netting DE was removed they continued to run along the inside of the hedge as usual, but looked over its top frequently as if realizing that there had been some sort of a change and that there was an attract- + Also Photo. Page. 1135A