Diptera.info

Posted by Lavendel on 02-05-2021 05:59

Is it possble to ID these?
Collected males and females, Forest near dunes, the Netherlands may 2021

Edited by Lavendel on 15-05-2021 08:16

Posted by Paul Beuk on 02-05-2021 08:37

Looks like a Ptiolina (unless it is very small, 2 mm or less). If you have a few you can spare I can confirm under the microscope.

Posted by Lavendel on 02-05-2021 10:53

I'am sorry, I did not mention the size. They are about 3 mm.

I thought the antennae didn't fit Ptiolina.
You're going to recieve some soon.

Posted by Paul Beuk on 12-05-2021 13:23

The antennae are indeed not Ptiolina-like, but the only alternative I could think of in Rhagionidae was Spania (smaller than Ptiolina) but that gave the same problem.
In the picture it is not visible there is a small apical stylus on the tip of the arista and that excludes Rhagionidae. Then remains only Ragas unica (Brachystomatidae, formerly Empididae). The shorter fork in R₄₊₅ miht have set me on the right track but those two specimens I received today are much more easy to work with.

Posted by Lavendel on 15-05-2021 08:15

Many thanks for the explanation and ID!!
I can imagine it is easier to work with the specimens themselves