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The Society for the study of flies (Diptera)

Affiliated to the British Entomological and Natural History Society (BENHS)

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#1 2018-09-21 17:59:49

colinleb
DF Members
Name: Colin Le Boutillier
From: Luton, Bedfordshire
Registered: 2008-03-03
Posts: 188

Delia sp

Is this Delia platura please?  Beds.  14 September 2018.


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#2 2018-09-22 11:02:28

Laurence Clemons
DF Members
Name: Laurence Clemons
Registered: 2008-04-02
Posts: 371

Re: Delia sp

If there is no fan of hairs on the middle metatarsus then you are probably correct.

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#3 2018-09-23 18:50:36

colinleb
DF Members
Name: Colin Le Boutillier
From: Luton, Bedfordshire
Registered: 2008-03-03
Posts: 188

Re: Delia sp

Thank you Laurence.  Here are two photos of the middle tarsi from different angles.  No fan that I can see.


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#4 2018-09-25 14:05:38

Laurence Clemons
DF Members
Name: Laurence Clemons
Registered: 2008-04-02
Posts: 371

Re: Delia sp

In Delia florilega, the other common species with a row of small setulae on the hind tibia, the fan is distinct and curved so this is most probably Delia platura.

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#5 2018-09-25 15:36:36

colinleb
DF Members
Name: Colin Le Boutillier
From: Luton, Bedfordshire
Registered: 2008-03-03
Posts: 188

Re: Delia sp

Thanks again Laurence.

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#6 2018-09-28 12:02:14

Michael Ackland
DF Members
Name: Michael Ackland
Registered: 2008-06-14
Posts: 191

Re: Delia sp

It is Delia platura, the shape of the cercal plate and surstyli are slightly different to Delia florilega. I attach photos of the mid tarsal fringe and genitalia of Delia florilega for comparison.
The hypopygium photo is apparently too large So I will submit later when I have sorted it out!

I get  a message to tell me why it won't upload, but it only lasts 3 seconds on the screen, so I don't know the reason. The photo is well below the limits stated, in fact less than those for the other photo.


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Last edited by Michael Ackland (2018-09-29 14:01:37)

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#7 2018-09-29 14:42:36

colinleb
DF Members
Name: Colin Le Boutillier
From: Luton, Bedfordshire
Registered: 2008-03-03
Posts: 188

Re: Delia sp

Thank you Michael.  Good to have photos to compare (in addition to your key/drawings).

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