Just last night they had a huge flight literally right after a moderately heavy rainfall. 16 hours in their setups they now have eggs (wow that's fast). I also have microscope pictures of some majors I found. The majors are extremely front heavy and have a very difficult time walking and sometimes end up stuck on their heads with legs in the air. Antwiki has determined that the Eastern Pheidole pilifera are monogynous. I am testing that right now out of the 9 queens I have. 3 of the setups are with 2 queens while the others are single. They definitely get along fine and clean each other.
Front heavy major: