Oral rim ducts Small ducts with sclerotized openings that occur on the bodies of mealybugs. Website https://www.google.co.il/search?q=Oral+rim+ducts&biw=1280&bih=687&tbm=isch&tbo=u&source=univ&sa=X&ved=0ahUKEwjSxOf9qa3SAhXFzRQKHYC3CkoQsAQIFw