Ted was just about to doze off some minutes later when Jill’s scream blasted into his radio and brought him springing to his feet.

“There!” Jill said, pointing.

Randy too was wide awake now, and the three of them stared, fear-stricken, across the dark drifts at a giant creature which stood at a distance looking at them. The light of Phobos and the stars was bright enough to show his awesome outline.

“What is it?” Ted whispered to Randy.

“It’s an elephant ant,” Randy whispered softly. “See that trunklike sucker on its head? Get the gun, Ted. These things are mean.”

Ted caught up the atomic rifle and set it for fire, thinking all the while how Mr. Garland had missed his guess about their not being troubled by animals. Slowly the enormous insect approached the opening in the rocks. It was indeed the height of an elephant. Ted could hear the rustle of its hard-shelled body as it walked nearer.

The Martian animal’s slowness up until now deceived Ted, for, without warning, the insect broke into a rapid run. Bravely Ted tried to take careful aim and protect the two unarmed ones with him. But even as he fired the gun, Jill bumped him in her mad dash to escape the oncoming horror.

Ted saw a blinding glare that lit up the scene for a moment as brightly as noonday. In that shocking instant Ted got a vivid view of the elephant ant, its brown spindly legs and antenna shining glossily, its curling trunk out-thrust at them menacingly. But as the blast of the rifle died out and the ant continued to charge, Ted knew he had missed his mark.

There was no time to fire again. Ted couldn’t carry much, but he dropped his useless weapon and gathered up the spare air cartridges. Then swiftly he darted after Jill and Randy, who seemed to have found a way of escape. He saw them disappearing through a narrow passage beside the rock. He was glad to see that Randy had managed to hang onto one of the flashlights and was leading the way with it.