Based on a feature "The Hive of the Hrrr'l" in White Dwarf 23, these are the Flyguard and Sandfly figures. the original article had three other types: the Flyman, Flymage and Northfly. If you have these, they're worth a bit!
Sculptor:
The Perrys
Painter:
Andrew Taylor
Unreleased Flymen
Flyguard
Sandfly
The Flymen from White Dwarf 23