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

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 Phasia aurulans

Stubby fly - Phasia aurulans - male Stubby fly - Phasia aurulans - male Phasia Number Two? - Phasia aurulans - male Batman Fly - Phasia aurulans - male Phasia species - Phasia aurulans - male Fly - Phasia aurulans - male Phasia? - Phasia aurulans - male Phasia? - Phasia aurulans - male
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 Phasiinae
Tribe Phasiini
Genus Phasia
Species aurulans (Phasia aurulans)
Body Length: 7-9mm (females usually smaller than males)
In males, a large golden-pruinose spot (roughly pentagonal in shape with tapered apex) is located on the post-sutural portion of the scutum (dorsum of thorax), as seen below:

This thoracic spot is uniquely diagnostic of the male of P. aurulans, at least among nearctic species of Phasia (cf. Sun & Marshall(1)). Male P. aurulans also have relatively wide, pictured wings; and two yellowish-orange pruinose, postero-lateral spots on the 5th abdominal tergite.
Females lack the gold spots on both the thorax and the 5th tergite, and have hyaline wings...thus they are more difficult to ID from a photo. (A key treating female P. aurulans appears in Sun & Marshall(1).)
Holarctic. In North America: Ontario to Nova Scotia, south to Tennessee and Georgia; also Northwest Territories, British Columbia, Alberta, Washington, Oregon(2)
Hosts: Hemiptera, reported on Elasmucha lateralis
Print References
Sun, X.-k. and Marshall, S.A. (2003). Systematics of Phasia Latreille (Diptera: Tachinidae). Zootaxa 276: 1–320.
Internet References
12 nice images from Denmark: the 2nd-4th images appear to be females (cf. this this Diptera.Info thread); excellent detail of face & mouthparts in the 5th and 7th images.
A female image from Finland.