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Diptera.info :: Identification queries :: Diptera (adults)
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Hybomitra solstitialis ? - ind1 - NW France => Hybomitra solstitialis
BLecaplain
#1 Print Post
Posted on 08-01-2025 21:49
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Posts: 62
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 Hello,

I have two specimens of Hybomitra species of bimaculata group to confirm.
Found in a alkalin marsh (by Malaise trap - 31/07/2024).
- notopleural lobes yellow/orange
- first and second antennal segment orange
- basal callus brown
- orange on tergite 1-3 and a orange spot on tergite 4
- black hairs on tergite 2-3
- cercus short not rounded
- subgenital plate with basal notch

With light notopleural lobes, bimaculata is exclude, distinguenda doesn't have black hairs on tergite 2-3 (and a different subgenital plate) and muehlfeldi have the two first antennal segment grey and not orange. Cercus are quite different.
So for me : solstitialis

The only difference with the second specimen (second post) is on venter : here, we have a dark median spot on tergite 1 with an clear extension on tergite 2.
BLecaplain attached the following image:


[125.94Kb]
Edited by BLecaplain on 13-01-2025 10:49
 
BLecaplain
#2 Print Post
Posted on 08-01-2025 21:49
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 abdomen
BLecaplain attached the following image:


[59.76Kb]
 
BLecaplain
#3 Print Post
Posted on 08-01-2025 21:50
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 notopleural lobe
BLecaplain attached the following image:


[105.88Kb]
 
BLecaplain
#4 Print Post
Posted on 08-01-2025 21:50
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 head
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[107.05Kb]
 
BLecaplain
#5 Print Post
Posted on 08-01-2025 21:50
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 subgenital plate and cercus
BLecaplain attached the following image:


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BLecaplain
#6 Print Post
Posted on 08-01-2025 22:18
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 underside
BLecaplain attached the following image:


[69.69Kb]
Edited by BLecaplain on 08-01-2025 22:18
 
Zeegers
#7 Print Post
Posted on 10-01-2025 20:17
Member

Location: Soest, NL
Posts: 18921
Joined: 21.07.04

 Totally !

Venter is variable (to some extent)


Theo
 
BLecaplain
#8 Print Post
Posted on 10-01-2025 22:28
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Location:
Posts: 62
Joined: 15.07.24

 Thanks Theo !
 
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Date and time
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