his house and eaten. The second was pretty big and Rhody was content with viewing it as a spectator, according to Julio, as I did not witness the affair, being absent looking for bird subjects for the movie camera. (Principally birds feeding young in their nests). June 3rd. 10:15 A.M. So far no change in thrasher and road-runner trends. Rhody still in his bunk at 6:45 A.M., coming down to get a mouse about 9 A.M. and immediately returning to the nest. He acts precisely- as if he were incubating and maybe he is. Temperatures are running in the high seventies and low eighties at present, so his nest addiction can not be attributed to cold. June 4th. to 7th., incl. Since the first of the month I have been absent several hours every day, but have observed the birds while home. The thrashers have incubated faithfully, but have been un- usually quiet and unobtrusive; in fact, although I have visited their area and called them several times each day, I have not seen either of them out of the nest during this period and have witness- ed no change of shift. The bird off duty seems to leave the place entirely and I have neither call for relief. Julio has had similar experience during my absences when he is expected to keep in touch with the thrashers and Rhody. During this period Rhody continued his recent practice of remaining in the nest most of the day (and night), coming down for but a few minutes at a time and then infrequently. Snakes are now numerous and he was seen to catch and eat one, after display, and discover another one too large to eat. He was also given a small yellow-bellied racer about 18 or 20 inches long. This he killed, presented at various reflecting surfaces with ritual, then took to the nest and ate. As soon as this operation was completed he came out to warm his back, perhaps to counteract the effect of the cold snake inside! In less than three quarters of an hour he was down again and discovered waiting patiently at the tool-house door for somebody to come and get him a mouse. He was given one and put it through the same treatment as the snake, precisely. It is difficult to understand his wanting a mouse so soon after eating the snake, and still more astonishing that he should have wanted the mouse so badly as to have resorted to the procedure which he uses only when very hungry. On the 7th., while he was still in his house, he was shown a dead snake (killed by an automobile) and came down at once to examine it rather casually, returning at once to his house. A half hour later a larger one (3 feet 6 inches long--alive) was placed at his landing place. He merely glanced down at it and resumed his "incubation". This almost continuous occupancy of his house is a marked di- vergence from his habit of former years. There has been nothing like it before, unless during the time when he was really incubating the future Archie and Terry. There are no eggs in his nest. It was examined on the 6th. during one of his short absences. Inci- dentally he returned at once when he discovered what was going on,