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Home » Guide » Arthropods (Arthropoda) » Insects (Insecta) » Flies (Diptera) » "Orthorrhapha" (Brachycera excluding Aschiza and Schizophora) » Nemestrinoidea » Small-headed Flies (Acroceridae) » Eulonchus » Eulonchus tristis
Photo#40543
Metallic Bee Fly ? - Eulonchus tristis
Copyright © 2002 Scott Nelson

Metallic Bee Fly ? - Eulonchus tristis
Pringle Falls, Deschutes County, Oregon, USA
June 12, 2002
Size: 18 mm
I have seen no images of this fly on bugguide. Did I miss it? Help with ID would be great.

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Metallic Bee Fly ? - Eulonchus tristis Metallic Bee Fly ? - Eulonchus tristis
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Contributed by Scott Nelson on 8 January, 2006 - 11:18am
Last updated 30 December, 2007 - 6:41am

Moved
Moved from Eulonchus.
… Scott Nelson, 30 December, 2007 - 6:41am login or register to post comments

Smallheaded fly!
Another great addition to bugguide! This is a smallheaded fly in the family Acroceridae. As larvae they are parasites of spiders, residing in the book lungs of their host, and sometimes taking years to mature to adult flies. Pretty sure this specimen is in the genus Eulonchus. There are many undescribed species in North America, so hold onto your specimen!
… Eric R. Eaton, 9 January, 2006 - 12:12pm login or register to post comments

 
Thanks for the help
This fly is still one of the most unusual I have ever collected because of its metallic body with the long proboscis. I have a couple of other specimens that are closer to the green hue. They were actively nectaring like all the other bee flies in the area. It was near a river on a steep embankment with wild flowers. Please see the following link for possible ID. http://www.ent.orst.edu/moldenka/Conservation/survey.htm Might be a Eulonchus tristis. See figure 11 on the linked page. This site confirms your information about trapdoor spiders. Cool. You are so knowledgeable!
… Scott Nelson, 9 January, 2006 - 7:36pm login or register to post comments

 
Eulonchus tristis
It does look like Eulonchus tristis. I've collected E. tristis from Salt Creek Falls, OR, on the Rhododendrons. This is a common species throughout northern California and Oregon.
… Dennis Haines, 3 December, 2007 - 5:14pm login or register to post comments

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