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View Thread :: Identification queries :: Diptera (adults)
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Rhagio with bicolor stigma
#1 Print Post
Posted on 16-11-2023 16:09

Location: North France, lille
Posts: 910
Joined: 08.06.10


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
clovis : France : Breil-sur-Roya : 06540 : 15/06/2023
Altitude : 1569 m - Taille : 10 mm
Réf. : 333912
clovis : France : Breil-sur-Roya : 06540 : 15/06/2023
Altitude : 1569 m - Taille : 10 mm
Réf. : 333910
#2 Print Post
Posted on 18-11-2023 10:37

Location: Soest, NL
Posts: 18563
Joined: 21.07.04

very interesting ! No way this is immaculatus.

i need to consider the options.

#3 Print Post
Posted on 18-11-2023 11:10

Location: Soest, NL
Posts: 18563
Joined: 21.07.04

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.

#4 Print Post
Posted on 20-11-2023 14:33

Location: North France, lille
Posts: 910
Joined: 08.06.10

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
#5 Print Post
Posted on 20-11-2023 20:34

Location: Soest, NL
Posts: 18563
Joined: 21.07.04

If you check for males of maculatus, you find that a vague or faded dark ring on front femur is actually quite common.

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