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I key this specimen with some doubt to Blepharomyia angustifrons, could that be correct? 3 specimens in yellow pan trap, 12 April 2021, Renkum, Netherlands.

Thanks for any reply

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That is very unlikely / hardly possible. Check for Phorocera (genitalia highly distinctive)

Theo

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Thank you for your comment. I first also thought Phorocera, but I could not key to that genus as I could not see any hairs on the prosternum nor a shadowfold of vein M. I checked the drawings of Phorocera genitalia in Emden 1954, but I think/guess the genitalia do not match. Keying the specimens with Emden 1954 I end up with Blepharomyia pagana, maybe that is a better match than B. angustifrons.

I have added some extra photos of the wing venation, prosternum, genitalia and front and rear view of the head. I am not entirely sure if these photo are of the same specimen as the previous photos, but all 3 specimens look very similar and have the same wing venation and chaetotaxy on the head.

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Hi Paul,

thanks for this effort. So we are making progress.
It is defintely not Blepharomyia nor Phorocera.

I am pretty sure it is the male of Lypha dubia.

Check the lappets on hind spiracle, difficult feature but highly distinctive !

Normally, you can ID this species even with binoculairs by its bronze colouration, but pan traps do not help here


Very common spring species.

Theo

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Hi Theo,

Thank you for all your help. The feature of the lappets is not that visible on my photo's, but I think they agree with Lypha.

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Yes, they do !


Theo