Though the party has been relatively quiet, the dead beetle releases pheromones that are caught by the remainder in the nest (that are still disturbed from their last combat, so they are also on edge). They come boiling out of the pits ~ but there is yet time for the party to take an action before the little beasties are upon them.
The little ones are babies; they've been hatched in just the last week to replace the mothers who died in the previous fight. They move faster than their parents, as it is clear that they are on the vanguard of the swarm - if 11 beetles can be called a swarm.
The party may take their next move.
Following that move, the map looks like this:
With this for experience earned:
The beetles will have their turn in the next post (we'll call it round 2 for simplicity's sake).