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Hello,

I have the following female Dolichopodidae from Lesvos, Greece. Using Grichanov 2007 I managed to identify the genus as Hercostomus and, using the key for the females, as H. exarticulatus. What do you believe? Below, I provide photos of the specimen, as well as the characters I used in the key:

1) Femora yellow.
2) Lower postocular setae light.
3) Antennae entirely black.
4) Fore tibia without median posteroventral seta.
5) Proboscis dark.
6) Wing veins R4+5 and M1+2 convergent, at least at apex.
7) Scutellum bare.
8) Metepimeron black.
9) Basal segment of antennal stylus not thickened at apex.

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Arista.

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Ciliae-1.

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Ciliae-2.

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Fore tibia.

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Head.

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Hind femur.

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Mouthparts.

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Pleurae.

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Postpedicel.

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Scutellum.

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Thorax.

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It is not H. exarticulatus.
There is a recently described species with similar characters. Unfortunately, its female was poorly described.
Hercostomus thraciensis Kechev et Negrobov, 2015: Acta Zoologica Bulgarica 67 (2): 200. Type locality: Bulgaria: Basha site, northwest of the town of Chirpan, 148 m. Palaearctic: Bulgaria, Israel, Turkey.

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Thanks a lot for the reply! Unfortunately, currently, we only have this one female. However, my colleague will try to collect more next spring!