A field study on the effects of repeated mowing on turf-inhabiting populations ofEndria inimicaSayOscinella fritL. was conducted. The insects were provided with a temporal choice of recently mowed turf versus turf not recently mowed.Endriasnowed no indication of lawn switching as a function of mowing, nor evidence of mowing-induced mortality.Oscinelladisplayed a strong mowing-related response. The frit files apparently move off of not recently mowed turf onto newly mowed turf, peak movement being detected at 1 h after mowing, but within 24 h no differences between the numbers of flies on recently mowed turf versus not recently mowed turf could be detected.The study suggests that, for the two turf-adapted species studied, mowing is not a negative factor, and that, forOscinella frit, it may even be beneficial.