none no species The shore fly, Hydrellia valida Loew (Diptera: Ephydridae) commonly mines the leaves of salt marsh cord grass, Spartina alterniflora Loisel, at Oyster Bay, northwest Florida. Its larvae are frequently parasitized by Opius sp. (Hymenoptera: Braconidae), and sometimes by Pteromalus sp. (Hymenoptera: Pteromalidae) and Sympiesis sp. (Hymenoptera: Euphidae). Life cycle and development; Parasites diseases and disorders; Parasites; Insect parasites; Hosts; Insect hosts; Host parasite relationships; Land and freshwater zones; Nearctic region; North America; USA Hydrellia valida (Ephydridae); Life cycle; Hymenopteran parasites; Opius; Pteromalus & Sympiesis; Plant hosts; Spartina alterniflora; Location on host; Prevalence; Florida; Wakulla County; Oyster Bay; Occurrence on host plant, life cycle & hymenopteran parasites Opius (Braconidae ); Sympiesis (Eulophidae ); Pteromalus (Pteromalidae ); Dipteran hosts; Hydrellia valida; Prevalence; Hydrellia valida (Diptera); Florida; Wakulla County; Oyster Bay; Dipteran host, prevalence in larvae & pupae