We dropped five big black ants into the midst of the marauders, and witnessed a combat as thrilling as the contest between the Greeks and Persians. Four of the insects alighted on a small rounded stone over which three hunting-ants were scurrying. Without hesitation the black giants fell upon the brown warriors and tore them limb from limb, with the loss of only half a leg. This is not a very serious handicap, when one has five and a half robust limbs left! The fifth big fellow dropped upon a mass of ants piled like football-players upon a struggling scorpion, whose sting was lashing the air in vain. The big ant started another ripple upon this pool of death, which soon smoothed away, leaving no recognizable trace of him. But the quartet of big-jawed fellows on their rock citadel fought successfully and well. No ant which crept to the top ever lived to return for help. The four flew at him like wolves and bit him to death. Soon a ring of hunting-ants formed around the stone, all motionless except for a frantic twiddling of antennæ. They were apparently excited by the smell of the blood of their dead fellows, and only rarely did one venture now and then to scale the summit. When we left, two hours afterward, the army had passed, and left the stone and its four doughty defenders, who showed no immediate intention of leaving their fortress. The ground over which the hunting-ants passed was absolutely bare of life, and, contrary to the rule in human armies, it was among the camp-followers and foragers that the most perfect discipline reigned. In the rear of the main army were lines upon lines of ants laden with the spoils: legs, bodies, and heads of insects and spiders, bits of scaly skin of lizard or turtle, joints of centipedes and scorpions, and here and there a piece of ragged but gaudy butterfly-wing borne aloft like the captured standard of some opposing force. We followed three lines of supply-carriers and found that they converged on some sheltered hollow in a tree or under a boulder or root. Here were massed countless hordes of ants clinging together like a swarm of bees. In the centre were the queen, eggs, and young of these nomadic savages, resting thus temporarily until the far-distant scouts should report another shelter, when the whole community would shift to the new home, farther along on the line of march. The army in which we were especially interested seemed to be carrying on their hunting in a rough circle about the temporary home, and perhaps this is a common habit. Certain ants apparently serve some function of direction or means of communication, for they keep to one place for a half hour at a time and twiddle their antennæ with every ant which approaches.