Carpenter bees belong to the Apidae family.
Xylocopa. The most familiar ones are the large carpenter bees of the genus Xylocopa. They get their name from their habit to drill holes in wood for nesting purposes. They prefer soft and untreated wood.
Ceratina. There are also small carpenter bees, Ceratina. They look very different and are considerably smaller. Instead of making their own nests by chewing on wood, they choose hollow twigs for nesting.