A sneering chuckle broke from Bram's lips. "Yes, it's me, James Dodd," he answered. "I'm a little surprised to see you here, Dodd, but I'm mighty glad. Still insane upon the subject of fossil monotremes, I suppose?" The words came haltingly from Bram's lips, as from those of a man who had lost the habit of easy speech. And Tommy, looking on, and trying to keep in possession of his faculties, had already come to the conclusion that the sounds were inaudible to the beetles. Probably their hearing apparatus was not attuned to such slow vibrations of the human voice. Also he had discovered that Bram was wearing the discarded shell of one of the monsters: he had not grown the shell himself. It was fastened about his body by a band of the hair-cloth, fastened to the two protuberances of the elytra, or wing-cases, on either side of the dorsal surface. The discovery at least robbed the situation of one aspect of terror. Bram, however he had obtained control of the swarm, was still only a man. "Yes, still insane," answered Dodd bitterly. "Insane enough to go on believing that the polyprotodontia and the dasyuridae, which includes the peramelidae, or bandicoots, and the banded ant-eaters, or myrmecobidae, are not to be found in fossil form, for the excellent reason that they were not represented before the Upper Cretaceous period." "You lie! You lie!" screamed Bram. "I have shown to all the world that phascalotherium, amphitherium, amblotherium, spalacotherium, and many other orders are to be found in the Upper Jurassic rocks of England, Wyoming, and other places. You--you are the man who denied the existence of the nototherium, of the marsupial lion, in pleistocene deposits! You denied that the dasyuridae can be traced back beyond the pleistocene. And you stand there and lie to me, when you are at my mercy!" "For God's sake don't aggravate him," whispered Tommy to Dodd. "Don't you see that he's insane? Humor him, or we'll be dead men. Think what the world will lose, if you are never able to go back with your specimens," he added craftily. * * * * * But Dodd, whose eyes were glaring, said a sublime thing: "I have given my life to science, and I will never deny my master!" With a screech, which, however, was evidently inaudible to the beetles, Bram leaped at Dodd and seized him by the throat. The two men fell to the ground, the ponderous beetle-shell completely covering them. Underneath it they could be seen to be struggling desperately. All the while the beetle horde remained perfectly motionless. Tommy thought afterward that in this fact lay their brightest chances of escape, if Bram's immediate vengeance did not fall on them. Either because Bram was not himself a beetle, or because in some other way the swarm instinct was not stirred, the monsters watched the struggle with complete indifference.