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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