Yes, they actually do look like flour beetle larvae, although I do culture some specie of flour beetle and that one is much smaller (the beetle is about the size of a fruit fly). I used them last summer to raise some L. lugubris hatchlings.
I'll try to culture those as well, because they seem to be the perfect size for juvie/adult L. williamsi and L. lugubris.
To be honest, right now I'm so desperate to get my hands on anything else other than mealworms and crickets (I haven't had much luck breeding crickets), that I'll try to culture anything. :roll:
And thanks for your reply!