Locations at the Agricultural Operations of the University of California, Riverside that were selected to survey for resident egg parasitoids of Bagrada hilaris. Yellow squares show the host fields that included squash: Latitude 33°57'58.08"N, Longitude 117°20'35.37"W; alfalfa: Latitude 33°57'54.20"N, Longitude 117°20'27.01"W; and mixed vegetables: Latitude 33°57'56.32"N, Longitude 117°20'25.48"W. Yellow dots show other locations where mustard weeds were found and sentinel cards were placed. The green dot represents the location where Trissolcus hyalinipennis was recovered and the red dots represent the locations where Trissolcus basalis was recovered.