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Hello Chris,

Finally I got an answer from Jim O'Hara... :) :) :)

He confirmed me the id: It is Parachytas decisus... :)

Here is his answer:

"I have compared your pictures with specimens in the Canadian National Collection of Insects and your species is indeed Pararchytas decisus (Walker). Your specimen is a female.

...

In many tachinids, there are two downwardly pointing bristles on the upper head outside the normal row of bristles and a bit above the level of the antennal base that are present in females but not males. They are visible in your photos."

Thank you again Chris for your great help!!!

Michel

http://parcours.pilonm.org