No need to remove the beetles, the entire life cycle can carry on in this setup. You may want to set up another container and move some of the beetles to establish a second colony.
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BigT
There is a difference between ignorance and stupidity. The ignorant can be taught, stupidity is beyond our control.
1.2 P. m. melanoleucus B/W N. J. Northern Pines
1.2 P. d. deppei Mexican Pines
2.2 P. l. lineaticollis Linis or Lined Pines
1.2 P. m. lodingi Black Pines
0.3 P. c. sayi Kingsville X Stillwater red bulls
1.1 Drymarchon melenurus Blacktail Cribo
1.2 D. corais Yellowtail Cribos
1.2 M. s. cheynei Jungle Carpet
2.6 L. p. pyromelana Arizona Mt. Kings
1.1 L. g. californiae B/W Cali kings
0.0.3 M. f. flagellum Eastern Coachwhips
1.2 G. m. bottegoi Western Plated lizards