Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada
Clickable Guide
Moths Butterflies Flies Caterpillars Flies Dragonflies Flies Mantids Cockroaches Bees and Wasps Walkingsticks Earwigs Ants Termites Hoppers and Kin Hoppers and Kin Beetles True Bugs Fleas Grasshoppers and Kin Ticks Spiders Scorpions Centipedes Millipedes



Family Sciomyzidae - Marsh Flies, Snail-killing Flies

Sciomyzidae -? - Dictya Sciomyzid - Sepedon armipes Lutzomyia shannoni - Limnia shannoni Sciomyzidae - Limnia Limnia mating marsh flies - Limnia shannoni - male - female Sepedon Euthycera flavescens? Euthycera arcuata - Euthycera flavescens
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Diptera (Flies)
No Taxon ("Acalyptratae")
Superfamily Sciomyzoidea
Family Sciomyzidae (Marsh Flies, Snail-killing Flies)
Synonyms and other taxonomic changes
northeastern fauna reviewed in (1)
Explanation of Names
Sciomyzidae Fallén 1820
almost 200 spp. in >20 genera in our area(2), all in the nominate subfamily; ~540 spp. in 62 genera total(3)
5‒10 mm
body yellowish, brownish, or grayish; antennae extend forward noticeably, a distinctive feature; wings often spotted or otherwise marked
northeastern spp., in (1); CA spp. (4); Indiana (3)
throughout NA and the world
adults around marshes, lakes, ponds, or wooded areas; larvae are aquatic
larvae parasitize or prey on freshwater or terrestrial molluscs; some prefer snail eggs(5)(6)
Life Cycle
The female scatters eggs in host habitat. The newly hatched larvae fend for themselves.(6)
See Also
Dryomyzidae are similar but have a well-developed clypeus
Works Cited
1.Sciomyzidae of northeastern North America
Schorno S., Marshall S.A., Murphy W.L., Muzzatti M. 2019. Canadian Journal of Arthropod Identification 35: 1-331.
2.Nearctic Diptera (Discover Life's IDnature guide)
3.Comprehensive taxonomic, faunistic, biological, and biogeographic inventory and analysis of the snail-killing flies...of Indiana
Murphy, William L. 2021. Proceedings of the Indiana Academy of Science, Vol. 129 (2), p143-265. 123p. .
4.The marsh flies of California: (Diptera, Sciomyzidae)
Fisher T.W., Orth R.E. 1983. Bull. Cal. Insect Survey 24, vii+117 pp.
5.American Insects: A Handbook of the Insects of America North of Mexico
Ross H. Arnett. 2000. CRC Press.
6.Hidden Company that Trees Keep: Life from Treetops to Root Tips
James B. Nardi. 2023. Princeton University Press.