This was "earning" or "gaining" flight, of which Dawson says the road-runner is incapable. I was glad to get this specific demon- stration, since the area of his wings always "looked" ample to me, even more liberal than that of the thrashers, though, of course, it can only be checked by actual weights and measurements. After he had calmed down, but still appeared to be looking for the mirror (or the mysterious bird) I put the mirror in another place outside the cage, this time perfectly horizontally. When he saw it from a few yards away he went directly to it--showing that he probably recognized it even in this position. He then proceeded to disprove the application of my tentative formula on page 823, for he again performed about and above it, though with somewhat less than with the mirror disposed vertically. ardor^ Instead of pecking at his image fairly hard, he was more inclined to nibble at it, though his display of plumage was good. In some respect it was more interesting in that he walked about the glass, permitting his display to be viewed at all angles. All of this consumed more than an hour. After this he had to see what Brownie and the other birds (especially the wren-tits) were doing, which required another half hour or so, and a similar lapse of time covered his leisurely approach to his roost. Somewhat before 5 he was tucked in for the night. The local activities of the thrashers are at present confined to early morning song by B, occasional occupancy of the nest by him, digging and long sub-songs, with occasional bursts of full song and talks with Nova. Nov. 2nd. Early thrasher song about as usual, ending about 8:30. About 11:30 Rhody entered the cage and immediately became much interested in the birds in the other compartments, watching them fly back and forth intently and trying to get into first one and then the other. He had no interest in food whatsoever and I believe his