Instantly movement became visible. Fifty, sixty, or a hundred tiny creatures, no more than half an inch in length, tumbled pell-mell from the dirty-white heap. Awkward legs, tiny, greenish-black bodies, and bristles protruding in every direction made them strange to look upon. They had tumbled from the whitish heap and now they made haste to hide themselves in it again, moving slowly and clumsily, with immense effort and laborious contortions of their bodies. Burl had never seen any insect progress in such a slow and ineffective fashion before. He drew one little insect back with the point of his spear and examined it from a safe distance. Tiny jaws before the head met like twin sickles, and the whole body was shaped like a rounded diamond lozenge. Burl knew that no insect of such small size could be dangerous, and leaned over, then took one creature in his hand. It wriggled frantically and slipped from his fingers, dropping upon the soft yellow caterpillar-fur he had about his middle. Instantly, as if it were a conjuring trick, the little insect vanished, and Burl searched for a matter of minutes before he found it hidden deep in the long, soft hairs of the fur, resting motionless, and evidently at ease. It was a bee-louse, the first larval form of a beetle whose horny armor could be seen in fragments for yards before the clayey cliff-side. Hidden in the openings of the bee's tunnel, it waited until the bee-grubs farther back in their separate cells should complete their changes of form and emerge into the open air, passing over the cluster of tiny creatures at the doorway. As the bees pass, the little bee-lice would clamber in eager haste up their hairy legs and come to rest in the fur about their thoraxes. Then, weeks later, when the bees in turn made other cells and stocked them with honey for the eggs they would lay, the tiny creatures would slip from their resting-places and be left behind in the fully provisioned cell, to eat not only the honey the bee had so laboriously acquired, but the very grub hatched from the bee's egg. Burl had no difficulty in detaching the small insect and casting it away, but in doing so discovered three more that had hidden themselves in his furry garment, no doubt thinking it the coat of their natural, though unwilling hosts. He plucked them away, and discovered more, and more. His garment was the hiding-place for dozens of the creatures. Disgusted and annoyed, he went out of the cavern and to a spot some distance away, where he took off his robe and pounded it with the flat side of his spear to dislodge the visitors. They dropped out one by one, reluctantly, and finally the garment was clean of them. Then Burl heard a shout from the direction of the mining-bee caves, and hastened toward the sound.