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Posted by Morten A Mjelde on 11-08-2022 23:01

Light trap in garden. Southern Norway 10 August. Body length: 5.9 mm.

Edited by Morten A Mjelde on 13-08-2022 18:59

Posted by Zeegers on 12-08-2022 08:50

First impression is Lydina, bit it is not as black as I am used to. Maybe result of the strong flash ?

Theo

Posted by John Carr on 12-08-2022 14:23

#10

Zeegers wrote:
First impression is Lydina, bit it is not as black as I am used to. Maybe result of the strong flash ?

Theo

I was also thinking Polideini. Sternite 5 has the right shape for Lydina (O'Hara 2002 figure 72).

Posted by Zeegers on 12-08-2022 15:08

#11

Good point. If you still have the specimen, you can check whether lappets of posterior spiracle are “Rhinophorid / Polideini”- like

Theo

Posted by Morten A Mjelde on 12-08-2022 23:58

#12

Thank you so much John and Theo!
The fly is rather dark. I think it may be similar to Lydina aenea (which I found in a light trap on 1 August last year), but the third antennal segment is different. Not sure what "Rhinophorid / Polideini"- like is, but perhaps the attached picture can tell something.

Posted by Zeegers on 13-08-2022 08:09

#13

This is what it is :)

There are two lappets of equal size, which is very unusual in Tachinidae and the almost unique feature for Polideini.

In other Tachinidae, one lappet fills the whole aperture and the other is strongly reduced.

Theo

Posted by Morten A Mjelde on 13-08-2022 13:27

#14

Thanks! Interesting! So then it's Lydina aenea? Cannot find Lydina or Polideini in The Tachinids (Diptera: Tachinidae) of Central Europe.

Morten

Posted by John Carr on 13-08-2022 14:50

#15

Morten A Mjelde wrote:
Thanks! Interesting! So then it's Lydina aenea? Cannot find Lydina or Polideini in The Tachinids (Diptera: Tachinidae) of Central Europe.

Morten

You have only the one species in Europe. It keys out at couplet 114 with summary on page 95 in the English version of The Tachinids (Diptera: Tachinidae) of Central Europe. That publication places Lypha and Lydina in tribe Linnaemyini. The original German version was written before O'Hara defined the Polideini and revised the North American species.