I’m in the process of moving some iris around and pulled up some of the black plastic I had in the back for weed control. Underneath was a large ant colony, with several large clusters of eggs. Most of the eggs were the small eggs I’ve usually seen ants try to move when their tunnels get wet. However in the middle there were quite a few of these larger sacs. With a little research on the web, I was able to find out these are pupae. It was quite interesting watching how 2 or 3 ants would coordinate moving the large cocoons down into their tunnels. Too bad their heroic rescue effort was all for naught. A few minutes later, a big rototiller came through and destroyed their entire neighborhood. Last time I saw them they were all filing in line, waiting to sign up for their government disaster relief funds.