what could cause the deformation of a darkling beetle?? i have had it occur before too. the mealworm appears healthy and normal, same goes for the pupa and then BAM!! out comes the deformed darkling beetle. this time around the beetle does not have a shell covering the body. why would this happen?? i keep it humid and warm during the pupa period. normally this does not occur, but it irritates me and was wondering the cause.