The rapid adoption of a diverse array of transgenic crops has raised concern about effects to non-target arthropods. While many studies have concentrated on population-level effects, often in monocultures, we investigated the influence of concurrent deployment of three transgenic cultivars on epigeal Coleopteran and Formicidae communities over two growing seasons. The plots represented diversified farms typical of northeastern agriculture. Transgenic cultivars consisted of sweet corn, potatoes and winter squash, expressing Cry1Ab, Cry3A and plant viral coat proteins that target Lepidopteran, Coleoptera, and aphid-transmitted viruses, respectively. Specimens were collected weekly using pitfall traps and identified to species. Species richness was estimated and compared using rarefaction curves. Various other diversity measures, including principal response curves, were used to not only compare community structure between crops, cultivars, and years, but also examine community-level shifts over time. Populations dynamics of several dominant species were also compared. Currently over 140 beetle taxa and 7 ant taxa have been identified with about half of all taxa represented by fewer than 5 individuals. Preliminary analyses indicate that crop type accounted for greater variation among populations and community assemblage than did different genotypes. Community evenness was typical of agriculture with a few species dominating in abundance.