Doomsday Deferred by Murray Leinster

Deep in the Brazilian jungle, a terrified family has found a way to bargain with something no human being was meant to bargain with. When an American naturalist realizes who—or what—is demanding payment, he begins to understand how easily an army of tiny creatures could become something far more dangerous. Doomsday Deferred by Murray Leinster. That’s next on The Lost Sci-Fi Podcast.