They are Weevils.
They don’t have a common name. I always think that it is sad when an insect doesn’t have a common name, it means that they have never made an impact and nobody has really noticed them. There is no folk lore. No villagers ever walked down a country lane commenting, “There’s a lot of those little Smut Bugs about this year,” “Yes, they say that plenty of Smut Bugs mean we are in for a good harvest.”