Under the Maples by John Burroughs

Maeterlinck, in his "Life of the Bee" resists the conclusion of Sir John Lubbock that flies are more intelligent than honey bees:

If you place in a bottle half a dozen bees [says Sir John], and the same number of flies, and lay the bottle down horizontally with its base to the window, you will find that the bees will persist till they die of exhaustion or hunger in their endeavors to discover an issue through the glass; while the flies, in less than two minutes, will all have sallied forth through the neck on the opposite side.