Flower beetle adult females suck up their larvae like offspring lawn mowers, but never saw that with tityus. Was it a female adult and what instar was the larva?I had an adult kill and eat one of my larva
I would bet your male just dug in there and tore the pre-pupa apart with his legs trying to find a place to rest, smashing it rather than eating it. If the male was newly emerged it wouldn't eat anything, especially not something it normally never eats.It was an adult male dynastes tityus. I found him eating one of his L3 siblings that was in a artificial pupal chamber about to pupate.