Ryzhov Maxim K. RussiaСаранскPublic Joint Stock Company “Rosseti Volga – Mordovenergo”, 40в Vasenko St., Saransk 430011, Russiamaxim.ryzhov@gmail.com Author's articles On the issue of sex differences in metric characters in Anguis colchica (Nordmann in Demidoff, 1840) (Anguidae, Reptilia)