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Very interesting. The female of sardous is unknown, so it is difficult / impossible to have a firm opinion. It looks quite like scolopaceus female. Yes, the femora are darker, but Rh. scolopaceus is notoriously variable in colouration. The spots at base of discal cell are connected, which is (mostly ? always ?) not the case in scolopaceus. The vertex seems to be narrower than in female scolopaceus, but very difficult to judge from this angle.

So, yes, this is definitely a candidate female sardous.

Theo