A fellow beekeeper called me as her hive was getting weaker and weaker.  The problem was, the hive had been queenless for a while.  I zoomed in so you can see the multiple eggs in each cell and the eggs that are laid on the side of a cell (rather than centered).  You can save a hive with laying workers, but it is a lot of work and I suggest combining it with another hive or just giving up on it (shake the bees all out in front of your other hives).  If you have other hives most of the workers will eventually get in, but the laying workers will not.  

If you don't know what a hive beetle looks like, here you go.  Thankfully, I don't have many of these - healthy hives keep them in check.  ​I know I'm not the only one who really enjoys squashing these when you find them.