his alternative roost in the acacia--my first thought was that he and Bb might have exchanged places. Brownie was unaccountably late. However, the mystery was solved when he and Nova finally appeared in the road near me, much interested in each other. I was unable on account of darkness to trace them to their final destinations, but, it was seen that a thrasher, possibly Bb, had the acacia roost. Sept. 14th. There was nearby early morning song, but by 7 A.M. it had shifted off to the south. A little later I thought I heard B's undersong about 25 feet from me in the shrubbery at the oval lawn. By shifting about I hoped to get his "parallax". To my surprise, I found that the direction from which the sound came remained approximately con- stant--from the south. The singer was finally located, by going south outside the property, in a tree located about 400 yards from the point where I first heard the song, as determined by map. B was not to be found here, but I think it was he, for some time after the song ceased he was here again with Nova and another bird. He seemed to be trying to "round up" Nova and get her to go to the dormitory tree. An hour or so later she was there with him, leaving as I approached, but B remained on the platform singing full song for several minutes more. He introduced his "A" song (p. 474), also the C variation (p.765) and a fifth variation, "F" not before recorded, in which the last three notes of A only were used. 9:30 P.M. The same peculiar rise in temperature after sunset noticed last year about this time. (See notes). Temp. at sunset 72, temp. now 74. No perceptible wind at either time. B in the acacia. Cooler(?). Bb not located. Nb not certainly seen today, though I am not sure that I could identify him now. Sept. 15th. A riot of song in the early morning here, B then going over to the Robinson place to sing there for a long time.