Researching the original Ancient scarabs, I found that the very early ones were very simple suggestions of a beetle form which I found very pleasing as if worn away by time until only the most basic features remained.
These two chaps I saw in the Museum of Natural History in New York are incredibly old (I can't remember exactly HOW old, but VERY OLD) and all that's necessary are a couple of marks to distinguish the two as representing human figures and even enough to give them personalities I think. (A small and surly character with a big, joyful friend, ancient predecessors of Ren and Stimpy??)