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Diptera.info :: Identification queries :: Diptera (adults)
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Diastata adusta
syrphus
#1 Print Post
Posted on 27-09-2020 17:19
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Location: N Scotland
Posts: 78
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I swept this fly from Myrica gale yesterday in W Scotland, VC105, NG89.

I would be grateful for any pointers to its identity.

Two more images will follow.

Thanks in advance,

Murdo
syrphus attached the following image:


[87.83Kb]
Edited by syrphus on 28-09-2020 10:07
 
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syrphus
#2 Print Post
Posted on 27-09-2020 17:20
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Location: N Scotland
Posts: 78
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And the head ...
syrphus attached the following image:


[86.34Kb]
 
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syrphus
#3 Print Post
Posted on 27-09-2020 17:20
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Location: N Scotland
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And finally the wing.
syrphus attached the following image:


[91.38Kb]
 
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John Carr
#4 Print Post
Posted on 27-09-2020 17:35
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Diastata?
 
http://www.flickr.com/photos/31715949@N00
Jan Maca
#5 Print Post
Posted on 27-09-2020 20:20
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Yes, Diastata adusta or D. boreonigra. Very dark coloration speaks for boreonigra. Still, reliable distinguishing characters can be seen only in male genitalia - and this specimen seems to be female.
 
Tony Irwin
#6 Print Post
Posted on 27-09-2020 21:28
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Location: Norwich, England
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I don't think boreonigra has been recorded from the British Isles yet - back to the Myrica for a male!
Tony
----------
Tony Irwin
 
syrphus
#7 Print Post
Posted on 28-09-2020 10:06
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Location: N Scotland
Posts: 78
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Thanks, all, for these comments. It keys out nicely as D. adusta in Chandler's key. D. boreonigra is not on the UK list.
 
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Tony Irwin
#8 Print Post
Posted on 28-09-2020 13:00
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Murdo - seriously, if you have an opportunity to get a male from the site, there's no reason why boreonigra can't turn up in the north of Scotland.
Tony
----------
Tony Irwin
 
syrphus
#9 Print Post
Posted on 28-09-2020 13:49
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Location: N Scotland
Posts: 78
Joined: 07.06.06

I will indeed, Tony. It is a new family to me, bycatch from sweeping for an aphid (if you are allowed to admit such a thing on a Dipterists' site). I will at least be aware of them now.
 
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