Diptera.info

Posted by Dmitry Gavryushin on 11-07-2007 10:43

Size 7 to 7.5 mm.

Title changed [Anthomyidae? to Eginia ocypterata]

Edited by Dmitry Gavryushin on 27-07-2007 18:06

Posted by Liekele Sijstermans on 21-07-2007 22:13

It is very quiet on this thread.
I am not sure, but I have an opinion.

It reminds me of Eginia ocypterata.

That is a difficult fly to identify from a picture.
It is difficult to assign at family level at all. It looks like a scatophagid, parasite with meral bristles as in tachinidae, but now placed in Muscidae.

Therefor picture could be compared with specimens in collection. Unfortunatedly I do not have a specimen in my collection. It is rare.

I found some drawings of Eginia. Hindlegs have more bristles in Eginia, but that might be a difference between male (on drawing) and female (on this picture?).

Black, did you collect specimens? And where did you take the pictures?

Liekele

Posted by Dmitry Gavryushin on 22-07-2007 19:36

Many thanks for your suggestion Liekele. Yes I've got one specimen, collected in the vicinity of Naro-Fominsk, Moscow region, Russia.

Posted by Kahis on 22-07-2007 20:19

Whatever the name is , it is nothing I've seen before. So please, tell us if and when you can confirm it is Eginia.

Posted by Liekele Sijstermans on 24-07-2007 10:38

Please check for positive identification:

Is it male or female?
Has it hairs on ventral surface of scutellum, laterally or in the middle?
Is meron with or without bristles near hind margin (before hind spiracle)?
Does anal vein reach or nearly reach the wing margin?

Liekele

Posted by Susan R Walter on 24-07-2007 18:25

#10

Dima

The hairs on the ventral surface of Anthomyids are surprisingly easy to see with good light and even just 10x magnification - they point downwards, and tend to run round the outer edge. They are a really useful character.

Posted by Nikita Vikhrev on 27-07-2007 12:22

#12

I examined specimen.
Liekele was absolutely right - Eginia ocypterata Mg.!
Fly has I wonderful hypopleural bristles!
Nikita

Posted by Liekele Sijstermans on 27-07-2007 14:06

#13

Black,

I hope Paul will add your beautifull pictures to the gallery.

For him the difficult choice in which family it belongs: Muscidae or Eginiidae.

As far as I know, it is a rare species.

Regards,

Liekele

Posted by Dmitry Gavryushin on 27-07-2007 14:32

#14

Many thanks Nikita (commissioned to solve that

) and Liekele. Fauna Europaea places it in Muscidae/Phaoniinae/Eginiini.

Posted by Nikita Vikhrev on 27-07-2007 14:42

#15

There is one important note.
In Gregor at all key for "Muscidae of Central Europe" in description of Eginia "anal vein does not reach the posterior wing margin".
According old Stackelberg's key "A do reach wing margin"
At least this specimens fits Stackelberg description - A obviosly reach wing margin as in Anthomyiidae.
Nikita

Posted by Tony Irwin on 27-07-2007 20:40

#16

With an anal vein that runs to the wing margin, and meral bristles, this really bends the rules for Muscidae, so it's great that Black has taken these wonderful pictures. This fly would have given me quite a headache if I had tried to identify it!