Nocturnal though the beetles had been, they no longer feared the light of the sun. In fact, it was ascertained later that they were blind. An opacity had formed over the crystalline lens of the eye. Blind, they were no less formidable than with their sight. They existed only to devour, and their numbers made them irresistible, no matter which way they turned.
As soon as the vanguard of the dark cloud was sighted from Broken Hill, the airplanes went aloft. Four hundred planes, each armed with machine guns, dashed into the serried hosts, drumming out volleys of lead. In a long line, extending nearly to the limits of the beetle formation, thus giving each aviator all the room he needed, the planes gave battle.
The first terror that fell upon the airmen was the discovery that, even at close range, the machine gun bullets failed to penetrate the shells. The force of the impact whirled the beetles around, drove them together in bunches, sent them groping with weaving tentacles through the air--but that was all. On the main body of the invaders no impression was made whatever.
The second terror was the realization that the swarm, driven down here and there from an altitude of several hundred feet, merely resumed their progress on the ground, in a succession of gigantic leaps. Within a few minutes, instead of presenting an inflexible barrier, the line of airplanes was badly broken, each plane surrounded by swarms of the monsters.
Then Bram was seen. And that was the third terror, the sight of the famous beetle steeds, four pairs abreast, with Bram reclining like a Roman emperor upon the surface of the shells. It is true, Bram had no inclination to risk his own life in battle. At the first sight of the aviators he dodged into the thick of the swarm, where no bullet could reach him. Bram managed to transmit an order, and the beetles drew together.
Some thought afterward that it was by thought transference he effected this maneuver, for instantly the beetles, which had hitherto flown in loose order, became a solid wall, a thousand feet in height, closing in on the planes. The propellers struck them and snapped short, and as the planes went weaving down, the hideous monsters leaped into the cockpits and began their abominable meal.