The abundance and activity of the striped earwig,Labidura riparia(Pallas) (Dermaptera: Labiduridae), were measured weekly in a cabbage ecosystem in central Florida over a 1-year period. Pitfall traps were most effective for monitoring earwig activity. Wire-cage traps containing live larvae of the cabbage looper,Trichoplusia niHübner (Lepidoptera: Noctuidae), adult female earwigs, or other food sources were evaluated as attractants or baits. Wire-cage traps containing cabbage looper larvae consistently caught the most earwigs, indicating that earwigs actively search for and eat these larvae. Laboratory feeding studies with caged earwigs confirmed bait preferences. The relative abundance and activity of earwigs as measured by pitfall trap catch corresponded closely to average weekly air temperature. Fewer earwigs were caught during the winter months (January through March), but earwigs were abundant and active during the entire year.