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Hello,

I observed this Chrysops the 11 of August in the marshes of Guines in the north of France. I hesitate between Chrysops viduatus and Chrysops caecutiens, is it possible to separate them with this single picture ?

Cordially Maxime

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Hello Maxime, we can exclude C. caecutiens as tibia II is yellow. But I think we cannot decide whether it's relictus or viduatus without seeing tergite 2.

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Palpus is short, so it can't be viduatus.This feature is actually more reliable than the abdominal pattern in males .... wait for the Field guide ! (dutch version is being printed as we speak....)


Theo

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Thank you very much for your help and these information ! I am impatient to see this document