My beetles aren't giving me baby mealies

I've had a large group of beetles in a container for over a month, and I havent seen a single baby mealworm yet, is this normal? Is it possible the beetles are eating the babies? (they have plenty of oatmeal to eat)

Eggs take 3-4 weeks to hatch and when they hatch, they are too small to see. After a few weeks you'll be able to see them squirming around. If you've been waiting a month, then wait another couple of weeks and you should see baby mealies. :) The worm stage takes 8-10 weeks.