time Eye color. The difference in color of the irides seems to be increasing: Okii still approaching Brownie's bright "orange brown" and Chiisai seeming to have arrived at Greenie's colder and more olivaceous hue: first described in these notes as probably being obtainable by putting a little green pigment in B's color. Sexual dichroism? It will be recalled that Greenie, to the last, although a mature bird with family, showed no signs of acquiring Brownie's same eye coloration. On the other hand, I believe (without looking up back notes) that I was satisfied that Nova had it. Still this may have been a case of malobservation and it is not impossible that dichroism of irides as between the sexes does exist in California thrashers. Or it may be that the female is later in reaching this stage than the male. Or there may be individual variation without regard to sex. 3:00 P.M. Rhody has continued to occupy his acacia melanoxylon post almost continuously since 9 A.M. except for two or three short absences and departures to get meat or to restore thermal equilibrium on the roof. (Time is approximate). 4:10 P.M. He is still (or again) there. 5:20 " (Approx.) He comes down, follows me for mouse, but considers the one offered too large, and I have none smaller. He accepts situation philosophically and departs. There seems to be nothing for him to do now but rest, preen and eat until some time next year. August 23 rd. (Typewriter repaired, new ribbon, degree sign (°) and exclamation point (!) added). Rhody was absent most of the day. Okii and Chiisai as usual, with perhaps increased frequency of digging song by both. August 24th. Rhody came for meat at the cage about 9:30 A.m., but as he was about to reach for it, I started for the shop. He at once changed his mind, appearing to divine my intention instantly and preceded me, running back and forth across my path just ahead of me in his eagerness, as if urging me to hurry. There was no ceremony about this mouse: one of a new batch just acquired and considerably smaller than he has been getting during the last month. He now retired a half dozen yards to one of his favorite perches, which I do not at the moment recall having mentioned as such in these notes: A horizontal branch of an oak by the south wall of the tool-house, not more than 5 or 6 feet above the ground amongst the rhododendrons. He likes this place, especially when he has been given a mouse not long before the time comes for him to seek his night roost. He stayed there resting and preening for perhaps an hour. Some time about noon he got his meat at the cage. About 2:30 Rhody, now sunning on the roof of the cage, was shown a blue-bellied lizard. He came down and played with it for 15 or 20 minutes without injuring it. His basic plan seemed to be to make it run so that he could have the fun of catching it again. Altogether, I should say, he picked it up and dropped it at least