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#1 2019-06-29 16:43:09

Rainieria
Committee
Name: Darwyn Sumner
Registered: 2008-02-20
Posts: 384
Website

Whitwell Common Asilids

The following were recorded at Whitwell Common (TG 086 201) yesterday:
A Choerades and a Dioctria I think, but which ones?


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Darwyn Sumner
DF Bulletin Editor, Scheme Organiser: Stilt & Stalk Flies

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#2 2019-07-02 23:19:57

Geoff F
DF Members
Name: Geoff Foale
From: South Devon
Registered: 2014-05-12
Posts: 219

Re: Whitwell Common Asilids

I have also been struggling with similar Dioctria and have tentatively labelled them as D. linearis. Front and middle legs all yellow including the coxae. Hind legs with yellow coxae and the underside of the femur yellowish. But from my experience, they don't always strictly follow this dress code! There should be some small orangish patches on the abdomen and I have found them on some of my photos; but they can be hard to see when under the wings.

Choerades are a blank space for me. Apparently C. gilvus has conspicuous adpressed ginger hairs on the abdomen while marginatus has less conspicuous pale yellowish hairs. But which of them matches your photo? Maybe size is the best clue. 17 mm body length for C. gilvus and up to 12 mm for marginatus

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#3 2019-07-03 10:10:29

Rainieria
Committee
Name: Darwyn Sumner
Registered: 2008-02-20
Posts: 384
Website

Re: Whitwell Common Asilids

Thanks Geoff.
I've now also posted them on Diptera.info in their specialist Asilidae section at https://diptera.info/forum/viewthread.p … d_id=90877 and https://diptera.info/forum/viewthread.p … d_id=90876 See what the European experts make of them.
It's a SSSI so maybe Norfolk LERC will be able to come up with an historic species list


Darwyn Sumner
DF Bulletin Editor, Scheme Organiser: Stilt & Stalk Flies

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