Old grassland in Nova Scotia frequently harbours comparatively high populations of wireworms. One such field near Hall's Harbour, Kings County, was found to be mainly infested with the wheat wireworm, Agriotes mancus (Say), with Hypolithus abbreviatus (Say), Dalopius pallidus Brown, and Ctenicera cylindriformis (Herbst) forming three, one, and 0.5 per cent of the total population respectively. During 1953-58, for various reasons, a total of 1,216 samples of soil each six by six by eight inches deep with adhering sod were taken from this field. The samples were sifted through ¼-inch mesh screen and the number of wireworms found in each was recorded. The number taken from an area flooded by melted snow and rain for at least three weeks each spring was compared with the number from the surrounding unflooded area. It was found that the average number per square foot in the flooded area was 11.8 and that in the unflooded was 9.2; the difference is significant at the one per cent level of probability. Rather scant records showed that carabid larvae were less numerous in the flooded area and it may be possible that a reduced number of these predators permits a greater survival of wireworms.