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I think it must be one of the two genera. I can't see any hairs on the arista, but that could be due to lack of quality. :|

Are there any other characteristics besides the hairiness of the arista to set apart these two genera. B)

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Same photo.

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Def. Sarcophaga.

You cannot see the plumose arista due to the angle of the picture: you could have seen them in a perpendicular view.


Theo

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Bedankt Theo!!! |t

But there remains my question: what do YOU see that makes it defenitely Sarcophaga and not Brachicome. Because obviously you see something I miss. ;)

Groetjes!
André

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Good question. I needed to think on that. It is called ' jizz'.

In Brachycoma, the silvery abdominal spots are broader and more transverse. Moreover, the abdominal tip is less conical than in this specimen.

If you have seen only one Brachyocoma, you don't think much of such features. If you have seen dozens, it is obvious.


Hope that helps.

Theo

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Theo,

Yes, I thought it should be something like that. Applying "keys" without being aware of it. Like recognizing a photo of George Clooney or your auntie Jane.
And as you say, that is very difficult to explain. How do I explain that this person is auntie Jane? You just KNOW. |t |t |t

I will try to discover these very subjective "feelingy" features. B)

Thanks, once again!!!

André

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Well, i bet some members of this forum can tell George Clooney from yiur aunt!

If you study 1000 (or 100). Sarcophaga closely, you will immediately tell Agria, Blaesoxipha, Eurychaeta (get me some !) and Brachycoma as different.

Theo