The Kythrythe (k-eye-th-rye-thee) are a different kind of people. They were once human, and have the same basic abilities. However, given their worship of the Insect God Kythrellemen, they have unique abilities granted through clerical blessings. You will have a human, with human hair and build, with yellow compound eyes where the human orbs are. Some have antennae. Each person has abilities (gifts/ feats) based upon their caste/ profession. Most of these adjust size, dexterity, sensory abilities, but some of the gifts grants insect based physical traits that give them enhanced abilities.
Their society is stratified with a caste system.
*)Breeder/Healer Caste: These females are both healers and the active breeders of the society. (There may be females of various castes, these are the only ones that can breed. Some people can be temporarily assigned to this caste).
*)Warriors: Just that.
*)Laborers: Big, Slow, Powerful. They lift, care, and follow directions.
*)Growers: Strong, often with built in plows.
*)Builders: build buildings are permanent big things.
*)Crafters: make small things or follow special crafts
*)Casters: magic users
*)Scholars: The workers of information
*)Inspectors: Specialists in sensory abilities.
*)Organizers: Middle Managers, and organizational wizards
*)Nobles: Those in charge, who tend to be less specialized.
*)Scouts: Unique independent, fast, like nobles except without specialized powers.
Remember that these people, except for their eyes, will be normal people at first glance. Some might be quite big or small or graceful, but they look like people. At second glance you will notice their small antena peeking out from their hair. Every now and again, you will see one that has been "blessed" by the God and granted "Marks of the God", insect like physical abilities.
History and the The City of Kythrythian
This city once had a different name. The ruling line of the time had managed to get the city cursed. Those "Of the City" could not be alligned with a "proper God" (human God). This was not that much of a problem until The Plague. The Plague was created by a God to strike down "disbelievers" (those without Gods) and a few lesser believers just to keep everyone else in line (10-15%). The plague would of destroyed the city. So the leader of the time prayed to a smaller Diety, Kythrellemen The God of Insects. The Diety, amazed that Humans would worship him, agreed and allowed all those who would allign with him to be saved. (You see Kythrellemen had talked with Plague God and said that all his followers should be spared… the Plague God agreed, not knowing The Insect God had human worshipers,... and so the city humans were saved).
Over the centuries the people of the city have "grown" into their allignment with Kythrellemen. They have taken to central organization reminicent of a hive. They have a caste system, with clerically (magically) endowed traits. (Humans of the City and surrounding area sometimes have taken insect traits). (Characters from the area can take them as Gifts/ Feats). They also ride and utilize giant insects as mounts, beasts of burden, and other tools. Kythrellemen is truly happy with this deal, as he has never had "big things" like people as followers before.
The 10-15% lost of population did a pretty good job of mangling civilization outside The City. It took two generations before things "got back to normal". (Don’t believe how this would happen? Check out the Flu of early 1900s or any number of European Plagues). This allows the monstrosity that is Kythrythian to develop unchecked by zenophobic humans. Now there is little they can do about it, as The City has grown incredibly strong over the last few decades.
Additional Ideas (1)
A caste society (while well-suited for bugs) is too stratified for my liking, and not chaotic enough, so it rules out many possible plot hooks. If you are a laborer, little can change that - you are bulky and stupid, and never can rise above your station...
As for characters from the city - they have far less free will than other PCs, which tends to tick off players.
As for the history - That is nice, and can lead to intersting situations outside the city - the neighbors will get scared by the 'mutants' moreso that the mutants prosper. They will be a scarecrow for the neighbors, an unified community that, while caring for every of its members, has little in the way of individualism...