The red imported fire ant, Solenopsis invicta, is a voracious generalist predator that has dramatically affected the native arthropod community since its introduction approximately 75 years ago. Most research suggests S. invicta negatively affects most native arthropods by consumption or displacement. However several studies have found that S. invicta forms mutualisms (positive species interactions) with honeydew-producing insects such as aphids. In field and greenhouse experiments we found evidence that S. invicta also forms a positive interaction with spittlebug nymphs. The presence of S. invicta has a significant negative effect on spittlebug predators such as spiders which in turn increases spittlebug nymph abundance. Therefore spittlebug nymphs indirectly benefit from the presence of S. invicta and thus fire ants and spittlebug nymphs form a comensalistic relationship. We hypothesize that the impact of red imported fire ants on arthropod communities varies due to the formation of these positive species interactions.