1485 Yesterday Okii, finding a Jerusalem cricket underneath a rock turned over by me, ran at once with it to Chiisai and held it a couple of inches in front of C's bill, waiting quietly. C took it gently, but ran off with it; O followed, but stopped short and C ate it. Also yesterday: Chiisai was given a large spider by Julio. He ran to find Okii; held it as above, but when Okii reached for it withdrew it and ate it himself. July 9th. At 8 A.M. I went directly to nest 8-37 expecting to find Rhody working on it; and he was, rattling his beak and crying when I appeared. At 9 A.M. he was still there and I got him a fresh supply of materials, which he began to use at once. In a few minutes I in- Vited him to the mousery and he followed part way, discovered a twig, picked it up and continued to follow me. After a few yards he seemed to think something was wrong, stopped, "thought", turned about and hurried back to nest 8-37. At 9:45 I was in the cage digging for O and C when I noticed a shadow on the pile of earth: Rhody on the roof waiting for me to come out, as subsequent events proved. The resulting mouse was taken to the mirror for a long display; thence to a north window of the shop; thence over the roof of the house to the patio; thence up the steps to a window of the living room; thence to nest 8-37. For the last half of his journey he was followed by a complaining russet-backed thrush, who left when he saw R eat the mouse in the nest. 12:10 P.M. I just left Rhody placing a twig in the glass house (nest 2-37, or 4-36). He had been working continuously on 8-37 up to a few minutes before. I found him near the thrush nest: one of the parents complaining overhead. (Their young were seen not far from there this morning). R, however, had no designs upon bird birds, but attempted to pull a dead oak twig out of a small azalea and failed. I pulled it out for him; he took it to 2-37, as stated. Strange bird! He took the afternoon off, but at 6 P.M. was found in nest 8-37. He followed me to the mouse place, displayed and proceeded down the lower road. His work today on the nest made a good showing and consisted in enlarging the north east end and making its walls higher. It is an odd nest for a road-runner, and appears to be 3 to 4 feet long and very narrow. While it is all one structure, I am inclined to the belief that it is "psychologically" three nests now, and may be considered as the expression in physical form of three distinct periods of intensified reproductive impulse superimposed upon the normal curve of his nesting cycle. (This can be represented graphically, as a means of illustration only, with no quantitative significance, as a sine wave: the fundamental wave of his cycle, with superimposed harmonics of high- er frequency: the intensified impulses above). Nest 8-37, then, represents three harmonics on the wave of his reproductive cycle. Chiisai's lost toe-nail shows no sign of being reproduced as yet. I was well hammered by both of them at once today. They also probed into my ears and nostrils. When in the cage I have to keep constant watch to avoid injuring them. They get under everything I move: feet, hands, chairs, rocks They are so devoid of fear that they will not get out of the way of