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For Insects, Spiders & Their Kin
For the United States & Canada
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Family Opomyzidae

little fly - Geomyza tripunctata fly with spotted wings - Geomyza tripunctata Heleomyzidae Perhaps? - Opomyza Picture-winged fly? - Geomyza tripunctata Fly - Opomyza Smiling-winged Sciomyzid - Opomyza Diptera, found in a bog - Geomyza Opomyza
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Diptera (Flies)
No Taxon ("Acalyptratae")
Superfamily Opomyzoidea
Family Opomyzidae
Synonyms and other taxonomic changes
revised in (1)
Explanation of Names
Opomyzidae Fallén 1820
13 spp. in 3 genera in our area(2), ~60 spp. in 4 genera total(3)
1-5 mm(2)
Wings with vein Sc incomplete (but R1 appears to swollen at the point of the subcostal break), humeral costal break absent, subcostal break present, cell cup present, head with 1 pair of orbital setae, postocellar setae usually absent, but if present, divergent, no distinct vibrissa developed, tibiae without dorsal preapical setae.
Anomalochaeta guttipennis: boreal, postocellar setae present, wings mostly dark with ~10 round hyaline spots
Geomyza: widespread, no postocellar setae, wings narrow, disc of scutellum bare, with shortened pair of basal setae
Opomyza: widespread, no postocellar setae, wings normal, disc of scutellum setulose, basal and apical scutellar setae subequal
adults on grass in moist areas; larvae probably stem borers(2)
Grasses including cereal crops
Internet References