As far as I am aware, mosquitoes are not an enemy (yet), but BURG-L has given me a mission to kill a few. Are they just exceedingly rare, or is the mission not intended to be available yet? Either way, something needs to be fixed, whether it be spawn rates or mission availability. Also, I have had a problem getting ant eggs to spawn, and I need to analyze one for a different BURG-L mission. I have tried killing all ants in the colony and waiting a day or two, and also killing as many ants as possible outside of the colony, and then checking. I have done this for over an in-game week with no luck, and I do not know if the spawns are bugged, or if there is some condition to make them spawn that I haven't figured out. Any information on this would be appreciated.

Ant eggs are deep in the nest they make bombs, plus there are no mosquito in the game yet. Just leave that mission to cycle out after a day.

I know they are supposed to be deep in the nest, but I have checked the entire nest multiple times, but I have yet to find a single one. Thanks for the confirmation about the mosquitoes, now I know I can just abandon that mission for now.

Ant Eggs are a glitch on the scale of the disappearing Raw Science.
Your save file is glitched, and you will need to restart to get Ant Eggs to spawn.
I can confirm Ant Eggs in the Western Ant Hill