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Moscow Region, Ramensky area, village Hripan vicinities, a garden site.
2013.06.15

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Hello Gumenuk Vitalij,

Yes, a Chrysops. Looks like C. caecutiens with the black legs...

Greetings,

Ectemnius

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I think it is Chrysops divaricatus...
Libor

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Ectemnius, libor - Thanks.
I incline to more Chrysops caecutiens

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If I see well, the black markings on 2nd tergum is demarcated from the 1st and 3rd tergum by yellow color, so my opinion is the same still. Theo will arbitrate it ;)
Libor

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Hello Libor & Gumenuk Vitalij,

I Incline to agree with Libor, as I have never even heard of C. divaricatus.
Theo, what say thee?

Greetings,

Ectemnius

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Thanks.
And Teo is silent. We wait for it the conclusion?

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I didn't response at first, because I agree with caecutiens.
And not for Ectemnius' reason !

But it is very difficult to call, so I had a second look.

In divaricatus, not only the black 'V' on tergite 2 is diverging (it is a V and not a U) but also it diverges more rapidly (so, it is a curly V). Tergite 2 is more white than yellow in divaricatus, as are the hairs on pleurae.

Agreed, the spot on tergite 2 does not reach the hind margin of the tergite. In this respect, this spot resembles viduatus (whici has red tibiae of course).
This happens once in a while in caecutiens, more so in sourthern regions. This form has been called ' f. ludens' in the literature.

I must admit, it is quite difficult to judge from this angle and I had my doubts as well.


Theo

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Many thanks