Mr. B. T. Gault has related an interesting anecdote that occurred in his experience with hummingbirds. He once found a nest of the Black-chinned species in which there were eggs nearly ready to hatch. Wishing the nest, which was an exceedingly fine one, he cut the branch only to find the eggs of no value as specimens. Finally, finding a nest in which there were two fresh eggs, he took them and substituted the two older ones. The female bird watched this action from a nearby branch. Returning a few days later, he was surprised to find two little naked worm-like bodies in the nest. Naturally satisfied and pleased over the result of his experiment he says: “The old bird seemed pleased too, as she watched me from a neighboring branch, while arranging her feathers, evidently wondering why I should take such a deep interest in her treasures. And well she might be pleased, for incubation had been robbed of all its tediousness in this case and the pair acting on this assumption undoubtedly hatched another brood, but not in such haste, I venture to say.” The nests are delicate affairs, and in many cases resemble small sponges, readily assuming their normal form if the edges are pressed together. The inner cup is seldom more than one inch in diameter. The walls are usually composed of the down of willows. This is firmly woven by an unsparing use of spider web. Usually a few small leaves and scales of willow buds are attached to the outer face, evidently to give it stability. It has been stated that hummingbirds invariably lay but two eggs in each set. The female Black-chinned Hummingbird seems to be at least one of the exceptions that prove the rule. Major Bendire says that “nests of this species now and then contain three eggs, all evidently laid by the same female, and such instances do not appear to be especially rare.” The Black-chinned Hummingbird is like all the other birds of its kind. Always inquisitive, never afraid to combat a foe and always active, the lines of Jones Very are especially applicable to its character: Like thoughts that flitted across the mind, Leaving no lasting trace behind, The humming-bird darts to and fro, Comes, vanishes before we know. [Illustration: BLACK-CHINNED HUMMINGBIRD. (Trochilus alexandri.) About Life-size. FROM COL. CHI. ACAD. SCIENCES.] THE AUTOBIOGRAPHY OF AN ANTELOPE. I cannot tell you the exact date of my birth. As I was separated from my mother at a very early age, this lack of knowledge on my part, I think, should be excused. But Polly has often told me it was the second day of April, 1866, that I came into her possession. On that particular morning the wind was very high and had a stinging bite in it and my mother, after giving me my breakfast, left me nestled down in a bunch of tall, dry grass, and went out for her own breakfast.