A redefinition of Vikramus Denmark & Evans (Parasitiformes: Mesostigmata) with a complementary description of Vikramus argentinus (Guanilo & Moraes) comb. nov.
  Redescriptions of Amblyseius cucurbitae Rather and A. paraaerialis Muma (Parasitiformes: Phytoseiidae) with new synonymies