These creatures were featured in one of the (tongue-in-cheek) subscription ads in <i>1984</i> (later <i>1994</i>) magazine from the late 1970s. They were either after the hero's copy of the latest issue, or something much more <strike>salacious</strike>sinister...<br /><br />The ad in question is on page 83 of issue 5, which may be obtained <a class="external" href="https://www.deviantart.com/users/outgoing?https://archive.org/details/1984-warren-05">here</a>.