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

See Moth submissions from National Moth Week 2023

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

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


Species Chalcosyrphus piger

Chalcosyrphus piger - female Syrphid Fly Lekking? - Chalcosyrphus piger - male Syrphid - Chalcosyrphus piger Black fly with deep red abdomen on Verbascum thapsis (common mullein) - Chalcosyrphus piger Chalcosyrphus piger Mydas Fly? - Chalcosyrphus piger - male Possible Chalcosyrphus piger - Chalcosyrphus piger Chalcosyrphus piger? - Chalcosyrphus piger
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Diptera (Flies)
No Taxon ("Aschiza")
Family Syrphidae (Hover Flies)
Subfamily Eristalinae
Tribe Milesiini
Subtribe Xylotina
Genus Chalcosyrphus
No Taxon (subgenus Xylotomima)
Species piger (Chalcosyrphus piger)
Synonyms and other taxonomic changes
Xylota pigra, Xylotina pigra
Explanation of Names
Chalcosyrphus piger (Fabricius 1794)
piger = 'slow, sluggish'
9-13 mm(1)
Medium-sized; metafemora enlarged. Dark thorax, wings. Abdomen bright red. Tarsi usually (or always?) dark. Note short appressed (not erect) hairs on thorax(1). This, and related members of the genus with a similar pattern are likely mimics of wasps, specifically Astata, a spider wasp(2):
holarctic, incl. most of NA (QC-BC to FL-CA-Mexico)(3)
Tends to move toward hilltops and other open, high areas for mating(1)
Mar-Nov in e.NC(4)
Works Cited
1.Syrphidae of Ontario
2.Kaufman Field Guide to Insects of North America
Eric Eaton, Kenn Kaufman. 2006. Houghton Mifflin.
3.Thompson F.C., Pape T., Evenhuis N.L. (2013) Systema Dipterorum, Version 1.5
4.Insects of North Carolina
C.S. Brimley. 1938. North Carolina Department of Agriculture.