Wikipedia
Vermileonidae
The Brachyceran family Vermileonidae (the sole member of the infraorder Vermileonomorpha) is a small family of uncertain affinities and unusual biology, containing fewer than 80 rare species in 10 genera. Historically the Vermileonids had been regarded as belonging to the family Rhagionidae, possibly in a subfamily Vermileoninae. Their biology and morphology is so markedly distinct from the main Rhagionidae sensu stricto, that the placement as a separate family has been widely accepted.