Finally Larner and Zorn determined to capture one of the insects alive, muzzle its lance and suction pad, and give it sufficient freedom to find its way back to its hiding place. By following the shackled monster the scientists hoped to find the breeding grounds. All the provinces of the planet joined in the drive. Men turned out in automatic vehicles, propelled by energy gathered from the atmosphere. They came on foot and in aircraft. Mobilization was at given points and, leading the van, were Zorn and Larner and their confreres in the targo of Nern and Tula Bela. The great army of Venus carried giant searchlights and was armed with deadly ray-guns. * * * * * Headquarters of the vast Army of Offense was in the targo of the Belas. Larner was in supreme command. Just before the big army set out to scour the planet to seek the breeding place of the monsters Larner issued a bulletin that set all Venus by the ears. Addressed to President Vole Vesta of the Republic of Pana and the good people of Venus, it read: As is generally known, it has been the habit of the nation's space-flying merchantmen to visit the sunlit side of the planet Mercury to obtain certain rare woods and other materials not found on this planet. One side of Mercury, as is known, is always turned from the sun and is in a condition of perpetual night. In this perpetual darkness and dampness, where many rivers flow into warm black swamps, the vampires have bred for centuries. Conditions were ideal for their growth, and so through the ages they evolved into the monsters we have encountered lately on Venus. During some comparatively recent visit to Mercury the grubs of these insects have found their way abroad a vegetation-laden targo left standing near the edge of the black swamps of Mercury. These grubs were thus transported to Venus and underwent their natural metamorphosis here. Reaching adult stage, they have found some place to hide and breed, and thus is explained the origin of the vampires of Venus. This was widely read and discussed and was finally accepted as the means of the invasion of peaceful, beautiful Venus by a horror that might well have originated in hell. However, this did not reveal the breeding grounds, or remove the nation-wide scourge of the horrible winged vampires, so the mobilization of all the forces of the planet continued. * * * * * As day followed day the hordes of fighting Venus dwellers grew in the concentration camps. In the targo of the Belas, Larner, brain-weary and body-racked as he was with overwork, found a grain of happiness in being in the presence of Nern and his beautiful, petite sister. With Zorn, Larner was supervising the construction of a big net of strongly woven wire mesh, in which it was hoped to catch one of the vampires. It was decided to bait the trap with a fat female lat.