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Diptera.info :: Identification queries :: Diptera (adults)
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Help! Are these all Scatophaga stercoraria?
Stephen
#1 Print Post
Posted on 18-03-2007 22:03
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Location: West Virginia USA
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I am confused. Are these photos all showing Scatophaga stercoraria?

Some some much hairier than others (I have just replaced an earlier image with the one right below, showing a very hairy individual).

Some are hairy, some are less so. Some were yellow, some green, some gray.

They weren't on dung, but were hunting like Tiger Beetles, preying upon other flies.

Thanks in advance for any help!

Place: Sugar Maple tree, forest, West Virginia USA, 13 March 2007. Size: 8.7 mm.
Stephen attached the following image:


[106.33Kb]
Edited by Stephen on 20-03-2007 21:57
--Stephen

Stephen Cresswell
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Stephen
#2 Print Post
Posted on 18-03-2007 22:07
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Here is one with its prey, which I believe is a Mycetophilid.
Stephen attached the following image:


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--Stephen

Stephen Cresswell
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Stephen
#3 Print Post
Posted on 18-03-2007 22:09
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Here is a detailed lateral view of the head and thorax.
Stephen attached the following image:


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--Stephen

Stephen Cresswell
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Stephen
#4 Print Post
Posted on 18-03-2007 22:11
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Is this the female S. stercoraria?
Stephen attached the following image:


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--Stephen

Stephen Cresswell
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Stephen
#5 Print Post
Posted on 20-03-2007 22:01
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This one was more green in color and less hairy than many of the others.
Stephen attached the following image:


[102.57Kb]
--Stephen

Stephen Cresswell
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Nikita Vikhrev
#6 Print Post
Posted on 20-03-2007 22:12
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Stephen, all images excluding N4 is S. stercoraria. N4 seems has not black antennae and bare arista.
Nikita
Nikita Vikhrev - Zool Museum of Moscow University
 
Stephen
#7 Print Post
Posted on 21-03-2007 10:40
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Thanks, Nikita! I will work on posting several views of the gray one as a new posting, and perhaps an ID will be possible of it too. Thanks again for all your help.
--Stephen

Stephen Cresswell
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