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But it's thanks to the link you gave that I was able to look ;)
I found the 1924 Faune de France by C. Pierre: https://faunedefrance.org/bibliotheque/docs/PIERRE(FdeFr08)Dipt.Tipulidae.pdf
It says that the thorax has dark banded lines, an abdomen with brown dorsal and costal bands and the prestigmata lunula covering the discoidal.
Photo illustrations are limited to the link I gave, but C. Pierre's description seems to match.