So he takes us over into Texas and shows us the ants at work. They destroy every plant on their little farms except that known as ant-rice. Compared to the size of the ants themselves, these grain-fields are giant forests, far bigger than the Sequoia Forests of California. The ants watch for rain at harvest-time as anxiously as a farmer, and on the first sunny day, they do their cutting and hurry the grain into the barn. Then on later sunny days, they bring it out to dry before finally storing it away.
"Well," you say, "is there anything left that these farmers don't do?"
I can't think of anything except the planting. One observer says that they do actually plant the seeds, and Doctor McCook says, he wouldn't be surprised if they did, but he never saw them do it.
THE OLD HOME PLACE
This is the farm of some Agricultural Ants in Texas. See the granary and the roads leading to it? They collect and store the seeds of a plant which from this fact is called "ant-rice." It looks like oats and tastes like rice. All plants growing around the nest—which is also called the granary—the ants cut away, so clearing a space for 10 or 12 feet. Roads 5 inches broad near the nest, but narrowing as they recede, are made for hundreds of feet in different directions.
In tropical America there is a species of ant that raises "mushrooms"; at least a kind of fungus that passes for mushrooms with the ants. They don't exactly set the mushrooms out, but they save time by planting both the mushrooms and the leaves that make them as one and the same job. This is how they do it. They climb the trees, cut circular pieces of leaf with their scissor-like jaws and carry them back to low, wide mounds in the neighborhood of which they allow nothing to grow; the purpose being, as it is supposed, to ventilate the galleries of their homes by keeping a clear space about the mound.
HOW THE ANTS RAISE MUSHROOMS
The leaves are used as a fertilizer on which grow a small species of mushrooms. The leaves are first left out to be dampened by the rain, and are carried into the ants' cellars before they are quite dry. In very dry weather the ants work only during the cool of the day and at night. Occasionally inexperienced ants bring in grass or unsuitable leaves, but these are carried out and thrown away by older members of the family. But you see how valuable all these leaves are to the soil.