Perhaps the sprinkler system flooded an ant nest yesterday; when I was walking up to the front door I saw lots of ants scurrying around in the wet grass and on the concrete--some were carrying ant larvae. I decided to use some of the ant-killer spray since I have half the bottle left. When I came out this afternoon, a lot of the dead ants and larvae were gone. I had seen ants carry the bodies of dead ants with them. What do they do with the bodies? Do they really cannibalize them? I guess this is really true of your garden-variety ants...