A photo would really help, as one person's "small" is another person's "big". Most likely would be a bee larva or part of a larva, that the nurse bees decided was infected, infested or otherwise unfit. By the way, larva is the singular, larvae refers to more than one!
So you found a larva, or some larvae.
Latin is a language,
As dead as dead can be.
It killed the poor old Romans,
Now it's killing me!