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I put this picture up last night for interest as it shows a dark Philodromus with a white band round the cephalothorax, but I don't think it's dispar. Anyway, I was rather tired when I did it, hence lack of explanation.
I agree, it's the wrong shade of 'dark' (too 'green') to be typical P.dispar, but I find Philodromus in general very difficult to ID even with mature specimen under a microscope.
BMIG website: www.bmig.org.uk (centipedes, millipedes & woodlice)
BMIG Newsletters ~ www.bmig.org.uk/view/resource/bmig-newsletter
BMIG Bulletins ~ www.bmig.org.uk/view/resource/bmig-bulletin
Lat/Lng: 52.3261, 0.577
OS grid ref: TL757729
On a bridge above a grassy riverbank