Imperium naturæ C. Linnaeus, 1758 - nature
   Mundus Plinius - physical world
     naturalia - natural bodies
       Regnum Animale C. Linnaeus, 1758 - animal kingdom see Kingdom Animalia Linnaeus, 1758
         Class Insecta Linnaeus, 1758 - insects
           Order Diptera Linnaeus, 1758 - true flies, mosquitoes, gnats
             Genus Empis Linnaeus, 1758
               1 Empis borealis Linnaeus, 1758
               2 Empis pennipes Linnaeus, 1758
               3 Empis livida Linnaeus, 1758