February 28th. At about 8:30 A.M. (bright and clear) I went to the cage temp. there 58; both birds, as is the usual case with them, at this time of day, under like or lower temperature conditions, with the sun shining into the cage at accessible places, were fully opened up in the "hollow bowl" sunning posture, back to the sun. This attitude, as is normally the case under such conditions, they maintained indefinitely without closing up at all. In the early hours after they leave their beds, in cool or cold weather, with sun, after months of observing them, I do not expect to find them doing anything else. As temperatures rise they invariably sun less, move about or seek full or partial shade according to circumstances. Under very hot sun, they are apt to sun themselves in the "spread-eagle" pose only; but this pose is rather rare. Without attempting a rigorous, critical analysis of the fore- going instrumental observations and correlating them with their actions, it looks as if the sole purpose of the hollow-bowl post- ure is to secure relief as quickly as possible from cold, or, perhaps to experience an enjoyable sensation. A little before noon Rhody appeared on the roof with a lizard and began a search of not less than three recorded hours for a candidate to receive the honor. He was observed at intervals until 3 O'clock, but after that was not checked up until about 5, at which time the animal was no longer in his bill. I took a tele- photo motion picture of him sitting with it, singing, on top of the highest chimney of this house. He wandered all about with it, with the usual accompaniments. On one of his visits to the cage, about 2:40, I knew he must be hungry, and decided to put his self denial to test, since he still had the lizard, and incidentally determine whether the lizard had more value in his mind as food or as the roadrunner equivalent of roses or orchids. He ran to me promptly when I held meat out for him. Then ensued a severe strain on his mentality which was quite obvious. He certainly wanted the meat, but did not know what to do about the lizard. First he acted as if he would swallow the lizard in order to make room for the meat. This impulse was abandoned. He next took the meat, still holding the lizard, and partly turned away as if to use it as additional temptation for a prospective mate, thought better of it, laid both down and looked from one to the other. (It is impossible to resist the thought that some sort of a mental process was involved). Elsewhere, in notes on Bryant's paper on Roadrunners, following p.118, I have given my reason for believing that lizards are Rhody's favorite food. Consequently, if he ate the meat and resumed his quest carrying the lizard, it would in- dicate a certain amount of self-denial on his part and a higher valuation placed upon the lizard as above token than as a comest- ible. (More anthropomorphism). What he did was to eat the meat and then stare, as I thought, perplexedly at the lizard. At last he picked it up and again hesitated as if undergoing a mental strug- le to fit his various impulses, reflexes and mental hazes into some sort of order which would result in appropriate action. At first it looked as if the lizard might join the meat, but the spirit of spring prevailed and he moved off with his funny little dog-trot (used when he is not in too big a hurry) and resumed his quest. Seen from the rear as he made off down the lower road to the west, with raised crest, he looked like a little drum-major with a bear-skin shako. For at least 20 minutes he still carried the lizard. At exactly 5:04 he was settled for the night (Sunset 6:02).