Thread subject: Diptera.info :: Rhagio with bicolor stigma

Posted by clovis on 16-11-2023 16:09
#1
Hi,

Here is a Rhagio from southern Alps I collected during this spring.
With bicolor stigma, it should be either R maculatus or R immaculatus (Or R chrysostigma, but thorax has some black).

Would you make it a dark R immaculatus? It doesn't have the black ring on femur one of R maculatus, but neither the abdominal pattern of R immaculatus


www.galerie-insecte.org/galerie/image/dos333/big/Breil%20sur%20Roya%20juin%202023%20Rhagio%20lat.JPG
clovis : France : Breil-sur-Roya : 06540 : 15/06/2023
Altitude : 1569 m - Taille : 10 mm
Réf. : 333912
www.galerie-insecte.org/galerie/image/dos333/big/Breil%20sur%20Roya%20juin%202023%20Rhagio.JPG
clovis : France : Breil-sur-Roya : 06540 : 15/06/2023
Altitude : 1569 m - Taille : 10 mm
Réf. : 333910

Posted by Zeegers on 18-11-2023 10:37
#2
very interesting ! No way this is immaculatus.

i need to consider the options.

Theo

Posted by Zeegers on 18-11-2023 11:10
#3
So, you got 'only' one specimen ?
The only reason I see why it should not be Rh. maculatus is because of the yellow front femur. If that is the only reason, I'd consider it for now an aberrant maculatus, till more turn up.

Theo

Posted by clovis on 20-11-2023 14:33
#4
Only one sadly! Frown
I'll stay on aberrant R maculatus then! Many thanks for your opinion. Smile
Edited by clovis on 20-11-2023 14:33

Posted by Zeegers on 20-11-2023 20:34
#5
If you check waarnemingen.be for males of maculatus, you find that a vague or faded dark ring on front femur is actually quite common.

Theo