''Librella'' is a genus of flies in the family

Cryptochetidae The Cryptochetidae are a small family of tiny flies (generally 2 to 4 mm long). Some twenty to thirty species are known. Generally they are metallic blue black, stoutly built, with the head broad and high and with clear wings.McAlpine, J. F. ...

. There is one described species ''Librella demetrius''.

References

Cryptochetidae Monotypic Diptera genera {{Diptera-stub