From the January 31, 1931, issue

ROBBER FLY MASQUERADES IN BUMBLEBEE’S CLOTHING

The villainous-looking hexapod that glares at you from the cover of this week’s SCIENCE NEWS LETTER is as bad a citizen as he looks. He is a robber fly, who should by rights be called an assassin fly, for his practice is to pounce upon other insects in the air, pierce them with his sharp beak, and bear them away to his cannibal feasting place.