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Hi Tony, again thanks for the fast reply and help! I checked Mathis (1993) revision of this genus and learned that in Eastern Polynesia (where I collected this fly), there is so far only Hecamede inermis reported, but that H. inermis might, after all, be a synonym for H. granifera. The description of the species in Mathis does in fact match very well the fly that I collected, so I might just book it in as H. inermis / granifera .