Diptera.info :: Identification queries :: Diptera (adults)
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 Diastata adusta
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| syrphus |
Posted on 27-09-2020 16:19
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Member Location: N Scotland Posts: 78 Joined: 07.06.06 |
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 09:07 |
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| syrphus |
Posted on 27-09-2020 16:20
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Member Location: N Scotland Posts: 78 Joined: 07.06.06 |
And the head ...
syrphus attached the following image:  [86.34Kb] |
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| syrphus |
Posted on 27-09-2020 16:20
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Member Location: N Scotland Posts: 78 Joined: 07.06.06 |
And finally the wing.
syrphus attached the following image:  [91.38Kb] |
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| John Carr |
Posted on 27-09-2020 16:35
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 Super Administrator Location: Massachusetts, USA Posts: 10418 Joined: 22.10.10 |
Diastata? |
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| Jan Maca |
Posted on 27-09-2020 19:20
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Member Location: Posts: 1250 Joined: 25.03.10 |
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. |
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| Tony Irwin |
Posted on 27-09-2020 20:28
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 Member Location: Norwich, England Posts: 7286 Joined: 19.11.04 |
I don't think boreonigra has been recorded from the British Isles yet - back to the Myrica for a male!
Tony ---------- Tony Irwin |
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| syrphus |
Posted on 28-09-2020 09:06
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Member Location: N Scotland Posts: 78 Joined: 07.06.06 |
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 |
Posted on 28-09-2020 12:00
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Member Location: Norwich, England Posts: 7286 Joined: 19.11.04 |
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 |
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| syrphus |
Posted on 28-09-2020 12:49
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Member 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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