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Hi Eric,

thank you very much for your answer. If I understand the wording in this book correctly, then Chrysotoxum intermedium and Chrysotoxum lessonae are two different species (they write about a complex) and all specimens found in Western Europe are Chrysotoxum lessonae. So C. lessonae is not just a synonym of C. intermedium. But that would also mean that C. intermedium does not occur in Germany. This must be a completely new knowledge.

Greetings Siggi