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TaxonomyBrowse
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Species Phasia aurulans

Stubby fly - Phasia aurulans - male Batman Fly - Phasia aurulans - male fly with metallic abdomen - Phasia aurulans - male Phasia species - Phasia aurulans - male Fly - Phasia aurulans - male fly - Phasia aurulans - male Brown Fly - Phasia aurulans - male fly - Phasia aurulans
Classification
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)
Size
Body Length: 7-9mm (females usually smaller than males)
Identification
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).)
Range
Holarctic. In North America: Ontario to Nova Scotia, south to Tennessee and Georgia; also Northwest Territories, British Columbia, Alberta, Washington, Oregon(2)
Food
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.