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3 April, Clitheroe England. Guessing from the Gallery, I thought the pre-sutural dcs too strong for Tephrochlamys, so maybe Heteromyza? Help please, Andrzej!

I caught a pair of these (possibly not this pair, as there were several flies together on the birch tree - they seemed to be finding sap), so what should I look for to determine species? Is there an easily available key?

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This is a different fly, but in the same place.

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It is a Heleomyza ! :D
Happy Eastern !!!

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Thank you Andrzej. Now you see why I need a key :D

Will my specimens get me any further?

Happy Easter to you too!

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Attach plz, a lateral shot ! and you can also take out the long styli from the male (or separate its from the abdomen).
There are two closely related specie: Heleomyza serrata and Heleomyza captiosa.
See, plz comments at the Diptera.info: http://www.diptera.info/forum/viewthread.php?forum_id=5&thread_id=27888.

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Thank you Andrzej. H. captiosa then?

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2

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3

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looking at the epandrium I go for captiosa

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Heleomyza serrata (L.) :D
Epandrium rather rounded than narrowed apically (egg-shaped ;) ) and styli rather banana-like than hockey stick-like typical characters for H. serrata !
Andrzej

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I have the key of Laci on my knees. You have it at hand? Page 6 in picture 3 C en D. You think that these are unclear. have to cnfess i had to look at least 10 times

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If the styli are under the slide are better to compare with others,
captiosa is here: http://www.diptera.info/forum/viewthread.php?forum_id=5&thread_id=27888 ;)
Andzrej

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Indeed, Andrzej, that photo is very clear. Do you have then a similar photo of serrata?

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It was a thread few weeks ago about the serrata/captiosa problem:
http://www.diptera.info/forum/viewthread.php?forum_id=5&thread_id=27392 . The styli are more thickened but enough for comparison

Andrzej

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Yes, these pictures are also in Papp Laci's key.

cheers

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Many thanks Andrzej :) We clearly need you more than we need a key :D

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I've got the message. I'll shut up.

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This you upsetting the Members again Stephen? You've been hanging around with the wrong crowd again. Tut Tut....:D

St. Roger of Mossbank.

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Sorry Ruud, I didn't mean anything like that. I found your questions very relevant, and I should have thanked you too. Please continue if you have more to say :)

Stephen.

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At least I only do it accidentally, Roger :P If I hadn't been called away for my tea at the critical moment I'd have been more careful :S

Is that 'Saint' Roger in the Simon Templar sense?

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I have my name against me. Some friends (yesss, I have them) like to say "Ruud, you are rude!"

No problem Stephen! Just good friend. Problem of this short messages is that misunderstanding is easy.
BTW, I can't add anything after Andrzej's message. The only problem I have with him is the spelling of his name ;-)

cheers,

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Thanks Ruud, glad we are still friends :)

Stephen.

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Ruud, no problem ! Andrew, Andrey, Andreas or Josef !
Andrzej Jozef W. :D

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I must admit I have a certain knack through years of experience.
Called away for your tea....:D......no answer to that one, hope it was nice :P.

Ruud...the only person Stephen is allowed to slag off on here is me, and he usually does so very eloquently, but to compare me to an eyebrow twitching piece of wood that passes itself off as an actor......this time he has overstepped the mark. :S

Disgruntled of Mossbank

Roger.....the other one. :D

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LOL

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It's the only halo on offer - don't knock it :D. No moore from me for a week; I'm off to play Purcell.

Stephen.