Thread subject: Diptera.info :: Diastata adusta
Posted by syrphus on 27-09-2020 16:19
#1
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
Edited by syrphus on 28-09-2020 09:07
Posted by syrphus on 27-09-2020 16:20
#2
And the head ...
Posted by syrphus on 27-09-2020 16:20
#3
And finally the wing.
Posted by John Carr on 27-09-2020 16:35
#4
Diastata?
Posted by Jan Maca on 27-09-2020 19:20
#5
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.
Posted by Tony Irwin on 27-09-2020 20:28
#6
I don't think
boreonigra has been recorded from the British Isles yet - back to the
Myrica for a male!
Posted by syrphus on 28-09-2020 09:06
#7
Thanks, all, for these comments. It keys out nicely as D. adusta in Chandler's key. D. boreonigra is not on the UK list.
Posted by Tony Irwin on 28-09-2020 12:00
#8
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.
Posted by syrphus on 28-09-2020 12:49
#9
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.