Well done getting the under-side/wing shot. According to Moths of Vict. Part 1 2nd Ed CD pages. E. fervens & guttularis are quite variable and overlap in markings & colour. In MALES (which this is) E. fervens has a dark patch on the hindwing underside in the 1/2 adjacent to the abdomen (when wings spread out/pinned). In E. guttularis the patch is pale/white. as above. Ian - I have verified this so I could upload the ID picture to the sp page.