Have a top bar hive with a screened bottom, then a bottom cover I can unlatch to let the hive get some air.

It has been closed for awhile due to the cool weather. So today I opened the bottom and saw some larvae on the bottom of cover. I guess the bee's can't get to them because of screen and they found a way to get into that space. Any way I am posting some links to the pics below. Can anyone identify what these critters are? Also I am thinking of coating the bottom of the board with some petroleum jelly to prevent this in the future.



Some who fell onto the ground.

And here is some new comb the bee's are working on.