Thread subject: Diptera.info :: Euthycera alaris or stichospila ?

Posted by Axel D on 15-10-2021 16:58
#1

Hello

I found yesterday this fly in a grassland part of a park where Medicago sativa is abundant.

I think it's either Euthycera alaris or E. stichospila because of the wing pattern and the head spots shape, but I don't know how to distinguish this two species (wing pattern is supposed to be a little different ?). Both species or known to be mainly Mediterranean species, but E. stichospila has been recorded from Belgium and the North-East of France according to this article. However I don't know if E. alaris can be found far from the Mediterranean coast as for my specimen.

Can you help me to identify the species ? I still have the fly so I can make other photos.

Found in Gagny, Seine-Saint-Denis, Île-de-France, France on the 14th of October 2021
Body length : around 7 mm

Thank you in advance.

Edit : I found a determination key in this article and in a similar one in another.
7. Wings with pale spots concentrated into distinct groups ...... alaris Vala
- Wings with pale spots not concentrated into groups ..............8 [including stichospila]

I can't see the groups of pale spots so it would be stichospila ?

Edited by Axel D on 15-10-2021 20:19

Posted by Axel D on 15-10-2021 16:59
#2

Side view :

Posted by Axel D on 16-04-2022 16:19
#3

Since this topic with a close fly was answered, I hope I could have an answer too.