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Hello Pristurus,

Following Chandler 1987 I come to a different conclusion. It certainly is not D. adusta. It has dark femora and darkened parts on the tibia.
Using the key I come to D. vagans. Diagnosis: Cross-vein dm-cu distinctly clouded, distinct dark costal border reaching r4+5. Mainly grey dusted species with yellow legs.

Greetings,

Ectemnius