There is a Twilight Zone or Hitchcock Presents along those lines with the Earwig eating through to the other side of some guys head, which the man survives. The end of the show has the Doctor giving the poor guy some more bad news: it was a female...and it layed eggs.
Could be the source! As for the post before yours, reminds me of the monkey brain scene from "Indiana Jones and the Temple of Doom!"
Scrump-dili-uncious! {sic!(k)!!}