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Is this Helophilus pendulus? How can I differenciate Helophilus pendulus from other similar Helophilus?
Thank you

location: Barcelos, Portugal
date: 2006/08/22

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Yes, it is a male of pendulus!
It's face has a black stripe, so no trivittatus! The hind margin of tergite 3 and 4 are yellow, so no affinis. The hind margin fron tergite 2 is black above the small yellow band, so no hybridus.
That leaves us with Helophilus pendulus!
Greetings,

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Thank you very much, Gerard. Your explanation was very good.

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Also, the 3rd femur is partially yellow and 3rd tibia abour half pale which excludes affinis and hybridus.

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Thank you Kahis

The more information the better.