[Syrphidae] Tropidia fasciata

[André van Eck]

Hi Wout,

The answer is yes!
There is a similar habitat in the Limousin, France, which Martin Speight 
knows very well. I have been collecting there on one occasion with him 
and found many of each species.
I would suggest contacting him if you would like to learn more about 
this specific place, which he knows much better than I do.

best wishes, André

wout.opdekamp at gmail.com schreef op 27-01-2025 15:25:

> Dear all,
> 
> Whilst mapping grassland vegetations in southern Belgium (mainly 
> Molinion and Arrhenaterion meadows) I discovered several populations of 
> Eumerus ruficornis, a new sepcies for Belgium.
> As to be expected on literature data they were only present in and very 
> close (never further than a couple of meters) to big patches of 
> Scorzonera humilis.
> 
> Interestingly the same was true for Tropidia fasciata. Several 
> circumstantial observations (densities of both sexes were highest in or 
> very closeby patches of Scorzonera humilis - while mapping several 100s 
> of ha I nevered saw them away from these patches; males patrolling and 
> guarding rosettes of S humilis, females crawling down S humilis with 
> their ovipositor extended, ...) make me believe S humilis might equally 
> be their hostplant.
> 
> Has anybody else made the same observation?
> 
> Regards,
> 
> Wout
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