Bio: Bipedal insectoids, somewhat resembling walking butterflies. Most can fly. They are peaceful, intelligent and friendly. Their home planet is Vortis. They were hostile to another race on the planet, known as the Zarbi, who were more ant-like and considerably less intelligent. Both sets of beings were unnaturally affected by the Animus energy, which caused them to be aggressive towards each other. Once the FIrst Doctor helped them to dissipate the Animus energy, both races lived in peace on Vortis.
Notes: These are alternately spelled "Menopterans" in the novelization of The Web Planet.