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Diptera.info :: Identification queries :: Diptera (adults)
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Flies entering sand wasp (Bembicini) hole
Stephen
#1 Print Post
Posted on 28-01-2021 16:47
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Location: West Virginia USA
Posts: 1320
Joined: 12.04.05

Terrible small photos, but maybe someone will recognize the behavior.

These flies were numerous around some gregarious sand wasps (Crabronidae: Bembicinae), and entered their holes when the wasps were not present. The wasps were, I believe, Stictia signata.

Any thoughts about the family of fly?

U.S. Virgin Islands (St. Croix), sandy beach about 15 meters from the ocean beach. Sand with patchy grass.

I believe (by memory) the flies were about 3-4 mm long.

www.americaninsects.net/21R-01-0117.jpg
Edited by Stephen on 28-01-2021 16:50
--Stephen

Stephen Cresswell
www.americaninsects.net
 
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Stephen
#2 Print Post
Posted on 28-01-2021 16:48
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Location: West Virginia USA
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www.americaninsects.net/21R-01-0117a.jpg

Another photo, showing the entrance to the wasp burrow.
--Stephen

Stephen Cresswell
www.americaninsects.net
 
www.americaninsects.net
Xylosoma
#3 Print Post
Posted on 28-01-2021 17:00
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Hi, my first thought was Chloropidae. And indeed, it seems that your picture fits well to Liohippelates known as cleptoparasitic on Stictia signata.
Regards
Xylo
Edited by Xylosoma on 28-01-2021 17:03
 
Stephen
#4 Print Post
Posted on 29-01-2021 19:31
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Thanks, Xylo. Looking further into my files, I found a better photo and notes that the length was 2.2 mm to the wing apex.

www.americaninsects.net/21-01-0644.jpg
Edited by Stephen on 29-01-2021 19:31
--Stephen

Stephen Cresswell
www.americaninsects.net
 
www.americaninsects.net
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03.06.21 11:11
@Tony Irwin Thank you Tony! I've emailed you there Pfft

02.06.21 22:26
Rob - can you PM me with an e-mail address, and I'll send it over.

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31.05.21 14:31
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31.05.21 08:37
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30.05.21 23:07
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30.05.21 20:06
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Looking for material? See here: https://diptera.i.
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