I am just wondering what is normal to see in a beetle board. I am using vegetable oil. Aside from beetles and a random bee here and there, I have a couple of cockroaches, (some ants, gnats) and what appears to be some pollen and wax flakes. None of that seems out of the ordinary. What I am not sure of is these very small, grey-ish crescent-shaped items. I am thinking they are dead larvae? Thoughts?