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Beware the leg colour as E. tessellata can have almost all dark or almost all yellowish red legs. I think this has something to do with the amount of light they receive as the two forms have been reported to inhabit woodlands and open areas. There is some old literature on this :- I can't put my hands on it right now but if you are interested, let me know and I'll look the references up fot you
cheers
Adrian