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

Calendar
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


TaxonomyBrowse
Info
ImagesLinksBooksData

Family Mydidae - Mydas Flies

Mydas fly - Mydas tibialis Attractive Mydas Fly - Mydas ventralis Bee species - Mydas tibialis large pollinator - Rhaphiomidas aitkeni - male Transmontane CA mydid record - Pseudonomoneura hirta - female Male Nemomydas tenuipes from the Presidio - Nemomydas tenuipes - male Nemomydas venosus? - female Mydas fly  - Mydas clavatus - male
Classification
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Diptera (Flies)
No Taxon (Orthorrhapha)
Superfamily Asiloidea
Family Mydidae (Mydas Flies)
Synonyms and other taxonomic changes
Mydaidae
Explanation of Names
Mydidae Latreille 1809
see Mydas
Numbers
~80 spp. in 9 genera of 4 subfamilies in our area(1), ~500 spp. in 66 genera of 11 subfamilies worldwide(1)(2)
Size
9-60 mm(3) (our spp. to ~30 mm); neotropical Gauromydas heros is world's largest dipteran(1)
Identification
Large flies (often wasp mimics) with prominent, clubbed antennae and distinctive wing venation:

Range
Worldwide, primarily tropical/subtropical, most diverse in Subsaharan Africa (esp. in the south) but poorly represented in the Oriental Region, with some representation in temperate climes(1); in our area, most spp. have restricted distribution, mostly in sw. US(3). Mydas clavatus is widespread, largely eastern.
Habitat
Primarily in arid environments, although quite a few species occur in forests(1), e.g., Mydas clavatus; larvae usually in decaying wood or soil
Season
Summer
Food
larvae of some spp. prey on beetle larvae(3)
Life Cycle
Larva and pupa of Mydas clavatus
Remarks
Batesian mimicry of large spider wasps (Pompilidae: Pepsis, Hemipepsis) by Mydas flies is discussed in(4).
Print References
(5)
Works Cited
1.Dikow T. (2001–2014) Asiloid Flies web-site
2.Order Diptera Linnaeus, 1758. In: Zhang Z.-Q. (ed.) Animal biodiversity: An outline of higher-level classification...
Pape T., Blagoderov V., Mostovski M.B. 2011. Zootaxa 3148: 222–229.
3.American Insects: A Handbook of the Insects of America North of Mexico
Ross H. Arnett. 2000. CRC Press.
4.Sonoran Desert Summer
John Alcock, Marilyn Hoff Stewart. 1994. University of Arizona Press.
5.The American genera of Mydidae (Diptera) with the description of three new genera and two new species
Wilcox, J., Papavero, N. 1971. Arquivos Zoologica (São Paulo, Brazil), Vol. 21 (2):41–119.