@book {Wiedemann:1828qe, title = {Aussereurop{\"a}ische zweifl{\"u}gelige Insekten. Als Fortsetzung des Meigenschen Werkes. Erster Theil}, year = {1828}, pages = {365-536, 568-573, 584-589}, publisher = {Schulz}, organization = {Schulz}, address = {Hamm}, keywords = {Asilidae, Euscelidia, Leptogaster, Leptogastrinae, Nearctic, Neotropical, Psilonyx, sp. nov.}, url = {http://www.biodiversitylibrary.org/item/50649}, author = {Wiedemann, C.R.W.} }