Technical Abstract: By increasing the speed of stridulatory movements and the rates of stridulation pulses, individuals and groups of Leptogenys kitteli (Hymenoptera: Formicidae) produce graded stridulatory responses to increasingly excitatory stimuli ranging from social interactions within a nest to prey items placed just outside the nest, and air puffs delivered at the entrance. The occurrence of graded stridulatory responses to stimuli contributes to evidence that stridulation has a significant communicatory role in colony activities of many ant species, even in genera, like Leptogenys, in which a stridulatory organ has not been retained in every species. Implications of stridulatory communication in different behavioral contexts are discussed. A better understanding of how ants produce and interpret vibrations may lead to new methods that to improve attractiveness of baits, or repel ants from electrical equipment housings where opportunistic colonies frequently nest.