Gibbs, A.E., 1902. Diptera. In Page, W., The Victoria history of the county of Hertford. Westminster. 1: 170., p.205.

Gibbs, A.E. & Barraud, P.J., 1908. A preliminary list of Hertfordshire Diptera. Transactions of the Hertfordshire Natural History Society 13: 249-276., p.206.