Looks like a fatal accident scene. 
Seriously, only one or two discarded larva is of no concern. The house cleaners are just doing their work by removing the dead.. When the front of the hive is littered with lots of dead larva, then it's time to dig deeper into what may be the problem.
Seriously, only one or two discarded larva is of no concern. The house cleaners are just doing their work by removing the dead.. When the front of the hive is littered with lots of dead larva, then it's time to dig deeper into what may be the problem.