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


Species Eristalis dimidiata

Eristalis dimidiata Wiedemann - Eristalis dimidiata Syrphid Fly (Eristalis dimidiata) - Eristalis dimidiata - male Fly ID - Eristalis dimidiata Fly - Eristalis dimidiata Drone Fly - Eristalis sp.? - Eristalis dimidiata Syrphid Fly - Eristalis dimidiata Eristalis dimidiata - female Another black Syrphid fly - Eristalis dimidiata - male
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Diptera (Flies)
No Taxon ("Aschiza")
Family Syrphidae (Syrphid Flies)
Subfamily Eristalinae
Tribe Eristalini
Subtribe Eristalina
Genus Eristalis
No Taxon (Subgenus Eoseristalis)
Species dimidiata (Eristalis dimidiata)
Synonyms and other taxonomic changes
Eristalis dimidiata Wiedemann, 1830. Synonyms, etc.:
Eristalis dimidiatus (spelling/gender)
Explanation of Names
From Latin dimidi "half" or "to halve" (1).
10-13 mm (Syyrphidae of Oklahoma), 10-14 mm (reported for Canadian specimens)
Wings clear (or slightly darkened), antennae, thorax, facial stripes and cheeks black. Thorax has dense, short, whitish hairs. Abdomen dark with whitish abdominal rings and often with an incomplete yellow band on tergum 2 and/or 3. Basal half of tibiae pale whitish, typically sharply demarcated (Syrphidae of Oklahoma). See images such as these:

Note that species-level identification in this genus can be quite challenging!
Eastern North America (guide images)
Typically found on flowers in open areas.
April-October (Oklahoma, Ontario)
Print References
Borror, entry for dimidi (1)
Marshall--photo 469.2 (2)
Works Cited
1.Dictionary of Word Roots and Combining Forms
Donald J. Borror. 1960. Mayfield Publishing Company.
2.Insects: Their Natural History And Diversity: With a Photographic Guide to Insects of Eastern North America
Stephen A. Marshall. 2006. Firefly Books Ltd.