Photos of a lone pupa, a mass of pupa and an adult beelte are attached. The pupa is hard but will wiggle if disturbed. Hard and black doesn't sound good.
If you haven't already seen it, check out the care article by Paul http://www.frogforum.net/care-articl...e-cricket.html
Wheat germ and bran aren't the same, I use both with no problems. JSG is probably right about oatmeal being too coarse- I do whizz it up in the food processor first. I also buy bags of all my worm food at the bulk store when it goes on sale.