Thread subject: Diptera.info :: Brachypalpoides lentus or Chalcosyrphus piger? --> male Chalcosyrphus piger

Posted by Reimund Ley on 16-08-2018 15:07
#1
please help to distinguish between
Brachypalpoides lentus and Chalcosyrphus piger.

the fly was about 8-10mm,
it was found in Germany, Bavaria, Nesselwang, near to border of Austria, altitude 1550m, 15. 6. 2018


greetings

Angelika/Reimund
Edited by Reimund Ley on 17-08-2018 15:19

Posted by Reimund Ley on 16-08-2018 15:07
#2
.

Posted by treebeard on 16-08-2018 17:00
#3
Brachypalpoides lentus has the black tip of the abdomen, while the abdomen of Chalcosyrohus piger is enitrely red. Unfortunately, it is not clearly visible from your picture.

Posted by Reimund Ley on 16-08-2018 18:46
#4
we have a look in the Syrphidae-Gallerie and mean to see
that our fly has a shadow of black tip of the abdomen,
but as you say it is not very clearly.

Here are two fotos from gallerie:

https://diptera.info/photogallery.php?photo_id=1888
https://diptera.info/photogallery.php?photo_id=2871

comments are welcome!!


best wishes


Angelika/Reimund

Posted by Gerard Pennards on 17-08-2018 12:01
#5
It's a male Chalcosyrphus piger. The most striking difference with Brachypalpoides in pictures like this is the thickness of the hind femur. In brachypalpoides the hind femur is much more slender as it is in piger. Find brachypalpoides pictures and compare and you'll see what I mean.

Posted by Reimund Ley on 17-08-2018 15:18
#6
hello Gerard,



thanks to you for your help, your time and indentifikation of this fly.
Also thanks for more information to distinguish these flys.


best wishes


Angelika/Reimund