Representative pictures of orders of Hexapods

Parainsecta
    Order Protura  -- Proturans

    © 2004 David R. Maddison

    Order Collembola  -- Springtails

    Baquero, E. & Jordana, R. photograph, copyright © (2002).

     Source:  BugGuide.net

Entognatha
    Order Diplura  -- Diplurans

    © 2002 David R. Maddison

INSECTA
    Apterygota
        Order Archaeognatha  -- Bristletails

    © 2004 David R. Maddison

        Order Thysanura  -- Silverfish

     © 2003 David R. Maddison

    Pterygota (Infraclass Paleoptera)
        Order Ephemeroptera  -- Mayflies

    © 2003 Alex Wild                                                                © 2002  B. Newton

        Order Odonata
            Suborder Anisoptera  -- Dragonflies

    © May Lattanzio, 2004                                                                          

           Suborder Zygoptera  -- Damselflies

    © 1997 Joseph L. Spencer

          (from Ecowatch)