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This was a biggish fly. At first glance I thought it was going to be a big Anthomyiidae but in close look, it looks more like Muscidae. Hope somebody can ID it. Thanks in advance, as usual!

Taken in Gijon Botanical Gardens, N Spain on the 19th June 2011.

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Another view.

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And another view.

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Looks like Potamia litoralis

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Thanks a bunch, Jorge!! That was quick!! ;)

Potamia seems good. But my fly gives the impression of having longer legs, more robust torax and more slender abdomen. Or perhaps my eyes are deceiving me! :S

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Anthos are very difficult to me, couldn't it be Eustalomyia? how can we differ then these two genera?
regards

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well I overlooked the anal vein. seems to reach the margin (in 1st photo)... if so, Eustalomyia would be better..

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I cannot see the long anal vein in the first shot but I can in another shot I have (got many). So it is Anthomyiidae in the end :):);) Well spotted, Paqui!! ;)

I have checked Eustalomyia and Eustalomyia histrio looks extremely convincing!! More than anything else I have checked.

Let's see if somebody can confirm this. Anyway, thanks a lot to you both, Paqui and Jorge!! :)

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Here is Michael Ackland's key for Eustalomyia (m&f):

1 Legs and palpus partly yellow............................................................................................................ vittipes Zett.
– Legs and palpus completely black......................................................................................................................... 2
2 Arista long haired, the length of the hairs on upper and lower side are each equal to width of postpedicel. Mid
vitta of scutum widened behind into a rounded spot............................................................................ hilaris Fall.
– Arista short haired or pubescent. Mid vitta of scutum equally wide throughout ................................................... 3
3 The length of hairing of arista in total equal to width of postpedicel. Hind tibia with 7 av setae.........festiva
– Hairing of arista significantly shorter, the arista is only pubescent. Hind tibia with 12 av setae..........histrio Zett.

You may be able to do it from your photos...

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OMG! OMG! OMG!

Thanks sooooo much for that, Stephen!!

I have worked on my pictures and the result is... Eustalomyia histrio!!!

In the general pictures I posted it is clear (I think, no doubt in the originals) that all legs are dark and so are the palpi.

I cannot see hairs at all on the aristas, and I think the pictures are clear enough.

I don't have a really clear shot of the rear leg but in the clearer, where I cannot see the whole leg, I count 10 setae and not even all the leg can be seen!

Going to prepare pics of all this so that you guys can give your opinion :) Back in a little while.

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Hi, i have a synonyms' doubt with this genera.

- Old keys separated E. festiva and E. histrio with the rounded shape of the end of the central stripe of thorax of E. festiva. (not M. Ackland's new ones, so maybe thorax's pattern is not reliable (?))
- I´m not sure if E. festiva and E. hilaris are synonyms
- Fauna E. accepts them as 2 species
- there are pics in the gallery with the 2 names
- M. Ackland keys' don´t include E. hilaris, but these keys are for British Anthos
- Fauna E. says them both (hilaris and festiva) occur in UK
¿?¿?¿? :|

Any help is welcome

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E. hilaris is the first option in couplet 2 of the Ackland key, and that's the one with the round end to the central vitta. I should say that in my copy of the key the name festiva is missing, and I have put it in.

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Thanks a bunch for your input, Stephen!!!

Definitely, I am not good at following keys if I have no experience with the family :S:S:S I didn't understand 'the round end to the central vitta' as I didn't manage to see it :@

Anyway, Stephen, if you are so kind to have a look at the details I am posting and see if they help you to confirm hilaris, I would be most grateful! ;)

The antennas:

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The palpi:

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The back legs: