Field parasitism of the face fly,Musca autumnalisDe Geer, by insect parasites and the nematode,Heterotylenchus autumnalisNickle, was investigated in south central Nebraska. Four species of insect parasites were collected from face fly puparia:Aphaereta pallipesSay,Muscidifuraxsp.,Eucoilasp., andAleocharasp.A. pallipeswas found only during the first 4 wk of the study (6–24 June), whereas the other three parasites were intermittently found, at low levels, for the remainder of the study (24 June–26 September). Total seasonal insect parasitism averaged 4.3%. Seasonal parasitism by the nematodeH. autumnalisaveraged 5.8% and peaked at 18% on 9 September.