One of my apideas is chucking out an above average number of dead bees.
These look like varroa and virus damaged bees to me.
short abdomens, shiny black, tongues out.

dead-bees-from-apidea1.jpg dead-bees-from-apidea3.jpg dead-bees-from-apidea2.jpg

They look fully formed but stunted. I wonder are the bees uncapping these from cells or can they detect a damaged bee once it has emerged and expel it.