Diptera.info

Posted by conopid on 21-01-2010 10:33

I have run this through Belshaw twice and arrived at Brachicheta, which it clearly is not. Can anyone suggest what it may be, so I can try again?

UK 12 June, from wet heathland with trees.
Size: 8mm length.

Posted by conopid on 21-01-2010 10:34

dorsal view

Edited by conopid on 21-01-2010 10:35

Posted by Stephen R on 21-01-2010 11:12

Might it be from Sarcophagidae?

Posted by conopid on 21-01-2010 12:18

Stephen R wrote:
Might it be from Sarcophagidae?

Nope, it's definitely got a sub-scutellum.;)

Posted by conopid on 21-01-2010 15:00

I don't think it's Rhinophoridae, but I am not at all familiar with them. Lydella may be a possibilty - it does look rather like that (but then many Tachinids are superficially the same!) I'll compare with Lydella in my collection. Thanks for the suggestion.

Posted by Jaakko on 21-01-2010 19:45

Lydella (not stabulans) is a good candidate. The genus is easy to recognize: one strong bristle in the r-vein node (can be seen in the pic) and 4st (three in some stabulans females, but these have characteristic pattern on the abdomen).

How does the face look like in lateral shot?

Posted by Zeegers on 21-01-2010 21:43

Lydella was my first impression as well, but there are strong discals on tergites and the tip of the scutellum seems to be pinkish.

The praealar seems to be short

My current guess would be Chaetogena

Could we please get a lateral of the face ?

Theo

Posted by conopid on 22-01-2010 11:45

#10

Hi Theo,
Here's a lateral of the head

Posted by Jaakko on 22-01-2010 20:14

#11

Black hairs behind the post-ocular row... Not i]Chetogena[/i]. Were there four katepisternal bristles? The bristles on the facial ridges rise quite far, but habitus is still Lydella to me.

Posted by Zeegers on 22-01-2010 20:53

#12

I agree

Looks totally like a male Lydella.

But which species ? if the abdomen really is so hairy, it should be stabulans. But the vertex is too broad, the claws are short and the head profile does not fit.
Apparently, the first pictures are somewhat misleading.

The

It is very likely the male of L. grisescens

Posted by conopid on 23-01-2010 10:19

#13

Thanks Theo,
I shall investigate along those lines. This may be one that I'll have to send to Chris for determination!

Posted by conopid on 23-01-2010 18:32

#14

Yes this is Lydella and is probably L. grisescens. It was the wing venation that did not match the couplet in Belshaw, so there is a very small chance that it might be L. thompsoni. I'll send it to Chris R just in case, but most likely it's grisescens.

Posted by conopid on 23-01-2010 18:33

#15

Posted by ChrisR on 25-01-2010 00:37

#16

Just came in on this thread ... been a tad busy :D I'd be glad to have a look at it - anytime :)

Posted by conopid on 29-01-2010 11:43

#17

Chris,
Great,I have it in a box along with a few other specimens for validation/determination.

Did you get the spreadsheet of Tachinid records I emailed a few days ago?