The Wasp Woman (1959)
HORROR OF THE WINGED MENACE!
The head of a major cosmetics company experiments on herself with a youth formula made from royal jelly extracted from wasps, but the formula's side effects have deadly consequences.
It's also been riffed by Cinematic Titanic, which features various MST3K cast. They haven't got the movie as a standalone on their YouTube, but it does pop up in the Forever-a-thon livestream fairly regularly. It's a fun riff, worth checking out if you enjoy riffing.