Seasonal Trap Abundance of Two Species of Psilochalcis Kieffer (Hymenoptera: Chalcididae) in Rangelands of the Eastern Great Basin of Utah, USA

Two species of Psilochalcis (Hymenoptera: Chalcididae) wasps occurring in the Great Basin region western United States were sampled from three locations central Utah (USA) over a two-year period using Malaise traps. Each location is composed four contiguous habitat types: pinyon/juniper (Pinus edulis or P. monophylla and Juniperus osteosperma), sagebrush (Artemisia tridentata), cheatgrass (Bromus tectorum), crested wheatgrass (Agropyron cristatum). Seasonal trap abundance for each was determined. minuta Petersen quadratis occur highest mid-May to early August. demonstrates significant association with habitat, specifically at Utah; Juab County, Yuba Valley sample site, whereas tectorum) same location.