Valdigian

Valdigians are a sapient insectoid species. A group of Valdigian war refugees escaped from their homeworld and settled on a ringworld located about 32,000 light-years from the Sol System.

Biology
Valdigians are winged insect-like creatures. They begin life as larvae.

Culture and society
Valdigians are supposedly ruled by a king. However, after settling on the ringworld, where resources are always plentiful, they came to realize that the king's authority was no longer needed. Since Valdigian laws dictate that the king can only assume power at 23 years of age, and that a provisional government would be in charge until then, they came to an arrangement in which a child would be selected as their king and resign from the position at 22, after which the young former "king" would live in comfort on a generous pension for the rest of his life. Meanwhile, another child would be selected as "king" for the next years, and so on.

Appearances

 * Big Finish Doctor Who audio stories, The Judgement of Isskar (2009)