Fry and Leela are stung by a baby queen bee, then the stinger breaks off. Queen bees do not lose their stinger after they sting. A worker is killed by stinging, since the stinger is barbed and is ripped from the bee's body. Queens have less-barbed stingers and do not have them ripped free. A queen may sting multiple times without being injured.
Response: But, these are Space bees, with possibly different physiology than Earth bees.