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View Thread :: Family forums :: Asilidae Forum
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Asilidae bluish gray, red apex, black and orange legs => Cerdistus cf. erythrurus
#1 Print Post
Posted on 22-08-2022 08:34

Posts: 44
Joined: 18.11.13

Hello everybody!

This supposed Asilidae resembles Neoitamus cyanurus. But the red color of the apex is surprising. Even if it was illuminated by outside light, there was not a strong sun, and the photo on the right of the montage was taken with a flash, 3 or 4 cm from the beast.
Bobabar : France : Cergy : 95000 : 10/08/2022
Altitude : 85 m - Taille : Lc = 9, 5 mm (mesurée)
Réf. : 308958
Bobabar : France : Cergy : 95000 : 10/08/2022
Altitude : 85 m - Taille : Lc = 9, 5 mm (mesurée)
Réf. : 308957

Bobabar, Cergy, 25 kms North-West of Paris, France
Edited by bobabar on 31-08-2022 14:42
Chris Cohen
#2 Print Post
Posted on 22-08-2022 19:57

Posts: 164
Joined: 15.02.19

Not Neoitamus, but rather Neomochtherus/Aneomochtherus or related
#3 Print Post
Posted on 23-08-2022 09:49

Posts: 44
Joined: 18.11.13

Thanks you Chris ! Smile

A colleague thinks of the genus Cerdistus. What do you think of this proposal?
Chris Cohen
#4 Print Post
Posted on 23-08-2022 16:51

Posts: 164
Joined: 15.02.19

Cerdistus is related to Neomochtherus and allies, so that is possible. I'm not entirely sure how to separate those genera to be honest.
#5 Print Post
Posted on 29-08-2022 08:25

Posts: 44
Joined: 18.11.13

Thanks Chris! Smile
It's a bit the same answer that my colleague gave me, asking for the genitalia to study them. But I did not capture the beast.
#6 Print Post
Posted on 30-08-2022 01:47
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Location: Tilburg Netherlands
Posts: 2198
Joined: 18.05.10

It is a Cerdistus cf erythrurus. The separation of Cerdistus is rather artificial but mostly they are small and have more DC than Aneomochtherus or Neomochtherus. Antennae always black. Somehow the separation feels "good" :-) At least I recognise them easily....


Field guide to the robber flies of the Netherlands and Belgium:
Mariastraat 12
#7 Print Post
Posted on 31-08-2022 14:21

Posts: 44
Joined: 18.11.13

Thanks you Reinoud ! Smile

THe last link is broken.
I think that the new link for Diptera is now :
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