Bedbugs!

Descended from the nest parasites of bats, the wingless bedbug—a.k.a. chinch, crimson rambler, mahogany flat, redcoat, wall louse—has long been a scourge of humanity, one whose enormously negative impact belies its tiny size. In this magic lantern slide circa 1894, artist Joseph Boggs Beale conveys the horror of an infestation with a grotesquely exaggerated specimen. In reality, an unfed, full-grown bedbug is less than a quarter-inch long.