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Upcoming Events

Photos of insects and people from the 2022 BugGuide gathering in New Mexico, July 20-24

National Moth Week was July 23-31, 2022! See moth submissions.

Photos of insects and people from the Spring 2021 gathering in Louisiana, April 28-May 2

Photos of insects and people from the 2019 gathering in Louisiana, July 25-27

Photos of insects and people from the 2018 gathering in Virginia, July 27-29

Photos of insects and people from the 2015 gathering in Wisconsin, July 10-12

Previous events


Family Opomyzidae

spot-winged fly - Geomyza tripunctata Opomyzidae - Geomyza tripunctata Geomyza? - Geomyza tripunctata Diastata sp. (?) - Geomyza tripunctata Vashon BioBlitz 2013 - Geomyza balachowskyi? - Geomyza Geomyza balachowskyi? - Geomyza balachowskyi Fly - Geomyza Geomyza balachowskyi ?? - Geomyza balachowskyi
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