Updated August 20th, 2016. Beetles are a group of insects that form the order Coleoptera.
The word “coleoptera” is from the Greek κολεός, koleos, meaning “sheath”; and πτερόν, pteron, meaning “wing”, thus “sheathed wing”.
The order contains more species than any other order, constituting almost 25% of all known life-forms.
About 40% of all described insect species are beetles (about 400,000 species), and new species are discovered frequently.
The largest taxonomic family, the Curculionidae (the weevils or snout beetles), also belongs to this order. (source)
So can hamsters eat beetles at all?
It really depends on the species of beetle, they can eat them, but they can’t eat beetles that have been caught in the wild as they may be carrying parasites.
If they have been bred in captivity, there is no harm in them eating them.
However, it is better to stick on the side of caution if you are uncertain.