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I found another one in my photo-archives, photographed on 6th September at Leerdam, Netherlands. Obviously a male this time, could this perhaps be the male of T. nigricornis?

Unfortunately the photos are of rather poor quality.

Thanks in advance.

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pic 2

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As far as I can see the trochanters are orange (not black), which should make this a male of T. atrata.

Lovely to see all these big craneflies !

Martin

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O.k., thanks for your help, Martin!
Yes, they are beautiful creatures, aren't they?

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Oosterbroek et al.'s key works also with these pictures: only 2 species have a stigmatic + an apical wing spot, i.e. Dictenidia bimaculata and Ctenophora nigriceps. The latter is not known from the NL, only from Sweden, so this must be D. bimaculata, which is also "the most widespread"and "relatively frequently encountered".

Also this species has 2 appendages on each antennal segment, against 4 in Ctenophora. Difficult to see in these pictures, but maybe this becomes visible if you enlarge the antenna in your picture..

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I already wondered about the wing spots, but I could not find a reasonable alternative. I really should get that key.
I'll see if I can enlarge the antennae, but I'm afraid the photos become really hazy then (these are already cropped).

Thanks, Louis!

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Two enlargements of the antennae.

Nr. 1

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Nr. 2

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Whoops, my turn to apologise for confusing things, I had forgotten about Dictenidia . Agree that this is bimaculata.

Martin

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O.k. Martin, then bimaculata it is Thanks for confirmation!