Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada
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Upcoming Events

Discussion, insects and people from the 2018 BugGuide 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

Photos of insects and people from the 2012 gathering in Alabama

Photos of insects and people from the 2011 gathering in Iowa

Photos from the 2010 Workshop in Grinnell, Iowa

Photos from the 2009 gathering in Washington


Species Goniocera io

Gray Fly - Goniocera io Parasitic Fly - Goniocera io
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Diptera (Flies)
No Taxon (Calyptratae)
Superfamily Oestroidea
Family Tachinidae (Parasitic Flies)
Subfamily Tachininae
Tribe Siphonini
Genus Goniocera
Species io (Goniocera io)
Synonyms and other taxonomic changes
Cartocometes io Aldrich, 1929
Distinguished from other North American Siphononi by the row of anterodorsal bristles on mid tibia (one or sometimes none in other genera). Also the scutellum is nearly bare dorsally (with many setulae in most Siphonini), femora are dark, tibiae are pale, and the body has a mottled appearance with spots at insertion of bristles tending to coalesce into brown patches. Vein R4+5 has several bristles between base and r-m, as normal in Siphonini, but other veins are bare. Both the BugGuide photo and the TachImage Gallery photo show a short spur in the middle of dm-cu.
Northeast USA and adjacent Canada
Larvae have been reported as parasites of Malacosoma (tent caterpillar moths).
Internet References