LESSER MEALWORM
(Alphitobius diaperinus)
 
Also called the cleaner beetles or buffalo worms - this beetle truly has it ALL!!! 
 They make an excellent feeder for small herptiles and invertebretes, being only 5-10mm in length and more digestable than yellow mealworms due to the low chitin in their exoskeleton
 Lesser mealworms also make an excellent  CUC for cricket and roach colonies, readily eating leftover food, sheds, and dead insects, thus reducing smell and extending time between cleaning. They would be  a great component of a  bioactive setup that is on the drier side. 
Finally, while they aren't nearly as effective  as dermestids, this species is capable of doing skull cleaning for taxidermy purposes as well.