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It is a pity that we have no good view of the wings. According to the key by Stubbs (https://core.ac.u.../60428.pdf), P. lacustris should have intense black markings (see also http://drawwing.o...stris-wing), and Stubbs' drawing of the genitals is also different. So no P. lacustris, but what? The genitals of P. albimana also don't match well. Those of P. paludosa, with outer knobs on the styles, look a little bit better, but this species is also said to have dark wing markings and a black abdomen. So here I am at my wits's end - sorry...
Regards, Sundew