Skorpius Fly

Biology
The Skorpius Flies where alien flies which where connected to a brain which was how they communicated. They where blue and barley the size ofm a Centimetre. (DW: Dreamland)

History
The Doctor encountered one in the Area 51 Vault, along with Seruba Velak. It chased them but they managed to get away from one after they hid in a crate. (DW: Dreamland)