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

Upcoming Events

BugGuide is a National Moth Week Partner. How to add your National Moth Week 2021 photos. July 17-25.

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

National Moth Week 2020 photos of insects and people.

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

Discussion, 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

Photos of insects and people from the 2014 gathering in Virginia, June 4-7.

Photos of insects and people from the 2013 gathering in Arizona, July 25-28

Previous events


Genus Megaselia

tiny fly - Megaselia fly-phorid? - Megaselia Fast black flies that periodically infest Dr. Larry Marh's Drosophila lab at the University of California, Irvine - Megaselia scalaris - male fly - Megaselia Phorid - Megaselia Phorid - midge parasitoid? - Megaselia nantucketensis - male scuttle fly - Megaselia small phorid - Megaselia - female
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Diptera (Flies)
No Taxon ("Aschiza")
Superfamily Platypezoidea
Family Phoridae (Scuttle Flies)
Subfamily Metopininae
Genus Megaselia
Explanation of Names
Megaselia Rondani 1856
~190 described & many undescribed spp. in our area; nearly half (~1,500 spp.) of the world's described Phoridae (and perhaps ten times as many undescribed) belong to this genus
larvae in moist decaying organic material, sanitation filter beds, sludge in sewer pipes and trash cans in public washrooms and homes, lab cultures of Drosophila, fresh or fermenting fruit, and sometimes in external wounds or in the digestive tract of animals, including humans
year-round indoors
many species are scavengers; some are herbivores, predators, parasites, or parasitoids
Larvae of M. scalaris display a unique behavior of swallowing air when exposed to a small pool of liquid. This allows them to float upon immersion, and may prevent drowning in natural environment. (Harrison & Cooper 2003)
Internet References
overview of habits and biology (Christensen 1998)