Zelus longipes, is known as a Milkweed Assassin Bug, though it is not typically associated with Milkweed. Both wingless nymphs and winged adults feed on soft bodied insects like caterpillars, and they are generally thought of as beneficial in the garden where they feed on armyworms and cucumber beetle larvae. If carelessly handled, Milkweed Assassin Bugs might bite and the bite is reported to be painful.