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Originally Posted by DL I hear that one often but its not realy true you can differenciate the species by examining the abdomen with a lens or by eye with a bit of practice and by a couple of diagnostic features such as the one mentioned. See Waring Townsend & Lewington pp 98. |
The guy who identifies the moths here, and another expert both tell me that it is only possible to identify these with any certainty is through genital examination & that the Waring features are far too variable to rely on (check out the amount of times the word 'usually' is mentioned in the identification paragraphs).