(the signal to his mate that he was about to relieve her) and she began to peer about. This is now the usual procedure. As the bird left the nest on the arrival of her mate just at 12:00 the eggs were uncovered for a moment and there were seen to be still three. This completes fourteen days of incubation for the first egg. (Assuming that incubation is carried on at night also). At 4 P.M., Brown-eyes on the nest, Green-eyes was induced to take over by giving him so many worms that there was nothing left for him to do. Still three eggs. Brown-eyes was sleepy on this shift, frequently closing her eyes; the first instance noted, showing that the bird on the nest does not always have all of its faculties alert. 6:05. Brown-eyes on shift, Green-eyes nowhere to be seen. Mrs. Wheelock says 14 days incubation; Mr. Brock 13. (May 1938 - J found at 16 days) March 23rd. Green-eyes off duty at 8:15 A.M. in the glade, her mate on the eggs. 12:05P.M. As Green-eyes came off and Brown-eyes stepped in there was no external visible evidence of the eggs having been sub- jected to 15 days of continuous incubation. Brown-eyes made a care- ful examination of them before covering them. 1:55. G.E. in the nest, B.E. in the glade below. Fed the latter till she had had enough then went up to the nest to watch the expect- ed change. B.E. came up and sat on the rim of the nest, but G.E. did not think it was time to change and refused to leave. I wrig- gled my fingers under his chin and he got off reluctantly, exposing 3 eggs before his mate settled upon them with much fluffing of feathers and sidewise oscillations to insure that the eggs should be thoroughly imbedded in ht efeathers and against the warm skin. At 4:40 B.E. was induced to come up on the platform and eat, shortly thereafter relieving her mate. Still 3 eggs. B.E. in