how would they have unded up in your substrate though? i know they are from mealworms, my leo geckos eat em, and that is DEFINATELY what they turn into :D
they are trying to breed them but arnt having any luck in getting them to the beatle stage and i said i had afew that were in the alien stage and would keep them for them... I use them for my leos too but never use all of them out of a tub... started a dubia colony of aswell...