(463) most indifferent to me. I had the birds well marked and, although they were about 20 feet from me, I could check all points of dif- ference except the only permanent one--the eye color--but fortunately that was not necessary, as Brownie's two wing imperfections were unmistakeable, Greenie suddenly crouched, raised her tail and head and began to call in a low voice. Brownie who was sitting on the small lath house about 8 feet from me immediately flew down, mounted Greenie and definitely carried the act of copulation to completion. Three times before in the past months I have witnessed this and had an uneasy feeling each time that I had the sexes transposed, but this is the first time that there can be no doubt. I called the birds, watching Greenie exclusively without losing sight of her at all. She came to me and got worms, then Brownie came. Thus before, during and after the act I had the birds identified at all times. This is somewhat of a shock. "It is hard to change the old skin". All the pronouns above the line of exes as applied to these birds, with perhaps an exception or two in the beginning are wrong. Without attempting to go back over the whole chain of events at this particular time, it appears that this discovery clears up certain puzzling features off-hand. The egg-laying observation was defective, either as to the bird seen at the time, or as to the fact of eggs being laid at that moment. The difference in eye color is more in harmony with what would naturally be expected, viz: Granted that a difference exists (and of this there is no question), the eyes of the male have the more colorful and brilliant irides. Then it ap- pears that the young all have the same colored iris as the female. It explains why Brownie wears the pants (p:450); why Greenie defers to him, is more shy, smaller, etc. I never was quite reconciled to the female being larger and heavier and more aggressive, but I could not get over the egg-laying mal-observation. It is clear that the discovery of the true sexes reveals the