It is quite possible that these bees do dies after stings, we just can't see it. Still, I think it is unlikely that Oddworld bees have barbed stings.
Science Factoid: the barbs evolved specifically for stinging mammals and birds, since leaving the venom sack behind will make the bees' stings much more potent, a valuable asset against such larger creatures. The original purpose of the sting- use in combat against other bees- is unchanged. Bees are able to safely remove their sting from the chitinous exoskeleton of other bees.
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