Abstract
Muiaria fertilis, parasitic on Xenochaetina opaca Hendel (Diptera, Lauxaniidae) from Ecuador, is described and illustrated. Various developmental stages of the new species are also described, and hypotheses on its biology are presented.
Acknowledgements
The authors wish to thank Vera Cristina Silva (Brazil) for identifying the host insect, Álvaro Barragán (Ecuador) for his help in collecting the infected flies, Walter Gams (The Netherlands) and Dario Lunghini (Italy) for their useful suggestions. This research was financially supported by The Ferdinando Peretti Foundation.