although it is not really white, front and rear. Sept. 18th. 9:15 A.M. Brownie is at his platform using all his vocal powers of pursasion to induce Nova to take more interest in the place. She is flitting about in the trees and bushes nearby and making occasional short visits behind the screen. There is much talk in soft tones, frequent snatches of full song and shaking of branches. B opened the day with song here, then went to the Robinson place where he was, it must be admitted, pretty noisy at times with his fellows. Border song When he is out on the rim of his territory his song is more assert- ive and harsher, I am convinced, than when he is here. Even Julio has noticed this without suggestion from me. The difference appears to be real, even allowing for the fact, that at a distance, the louder tones are the ones most readily heard. I have thought for a considerable time that this is a type song which might be tentatively- designated as "border song". By 8:20 he was back, in the act of carrying a sheaf of soap- root to his platform, entirely out of logical sequence from structural considerations alone, if this is a real nesting operation, although not unprecedented. Such behavior often precedes serious nest-build- ing and seems to be a sort of uncoordinated reflex. During the rest of the day, the platform was occupied by B at times and he continued his tactics of inviting his mate with partial success. At sunset he made for the dormitory tree, considered the matter for a few minutes at the base of the tree (weather--no wind) and decided in favor of the acacia. I waited to see if Bb would be eject- ed from the tree, but he was not there. Bb was, once or twice earlier in the day, threatened by B and com- plained about it, but moved off without being pursued.