Thread subject: Diptera.info :: Tabanidae Alps

Posted by clovis on 15-09-2019 22:26
#1

Hi,

Someone gave me this Tabanidae from the Alps. Infortunatly I don't have the altitude. Close to a torrent.
To what I see on different angles, there is nolines on the eyes. No hairs on the eyes.
I can't find any relevant identification. Do you have any idea?
Sorry for the poor condition of the specimen.

Molines en Queyras, 31/07/2012
zupimages.net/up/19/37/fpo6.jpg
zupimages.net/up/19/37/8uxl.jpg
zupimages.net/up/19/37/lmoh.jpg

Posted by Sergiy Filatov on 19-09-2019 22:10
#2

I would never be 100% sure about eye bands looking at a dry specimen but absence of the stripes+brownish sides of the abdominal tergites suggest Tabanus miki...

Posted by Zeegers on 22-09-2019 15:05
#3

It is very tricky, not to say impossible, to judge the number of bands from pictures from dead animals..... If the specimen is still available, I'd like to see an lateral closeup of the head, showing the occiput.

Thanks


Theo

Posted by clovis on 02-10-2019 14:08
#4

sorry for the long delay, I was quite taken last week.

Here is the close up (no easy to do, I guess you are looking at the pilosity)

I noticed for the eyes bands: I have a large number of T bromius, and I can see the eye band on less than half of them!

zupimages.net/up/19/40/sb2w.jpg
I can make other pictures.

Posted by libor on 02-10-2019 17:20
#5

Dried specimens are losting eyebands very often. You can see them after refreshing, e.g., in water...

Posted by clovis on 06-10-2019 17:30
#6

Thanks, I'm doing so right now! |t

Posted by clovis on 07-10-2019 09:01
#7

Really efficient technique!
zupimages.net/up/19/41/7bi9.jpg
3 bands then, that lead me to T tergestinus

Posted by Zeegers on 07-10-2019 16:55
#8

I understand, but no, no way.

No it has three bands, my gut feeling is proven right: it is a female Hybomitra, which somehow lost the hairs on the eye.


Theo

Posted by clovis on 07-10-2019 21:07
#9

Zut! Didn't see that coming when I first try to ID it!
I'll try with this genus!

By the way, congratulation for the Tabanidae dutch key! Really really nice to have all those drawings and pictures, that are often so missing in other keys.
A bit sad that it isn't in English, but online translator give some understantable translation (if you more or less know what to look at) |t

Posted by Zeegers on 08-10-2019 06:37
#10

Thank you, tthank you.

We are working on an English version, for all Tabanomorpha !

Theo

Posted by clovis on 09-10-2019 14:50
#11

Not so easy. I balance between H expollicata or H acuminata. But I guess I am wrong on something, those two species appaer to be saline species, not sure we can find thi in the middle of the Alps.

The red extend until half the third tergite.

Posted by Zeegers on 09-10-2019 19:02
#12

As you said, can ‘t be. Moreover, the stem of the haltere is dark.

It is H. momtana.

Theo

Posted by clovis on 11-10-2019 22:12
#13

I was quite bad on this one. Thanks! |t