Weevils! Those tiny little,pesty little things that we sometimes fins in our cabinets, invading our rice, and cereal and other dry goods, come into our homes via the flour that we purchase at the market. Adult weevils lay their eggs in flour. Government regulations, for flour purity,believe it or not actually allows a percentage to get in.
I believe Weevils come from flour,that is where they lay their eggs. I normally freeze the flour or maize meal or add a bay leaf or two inside the container it works as a repellent. Alternatively, empty your Weevil infested flour into a tray and leave the tray in the sun allowing the sun to penetrate, the weevils should flee.