Order Chilopoda—Centipedes.
Order Chilognatha—Millepedes.
Class INSECTA.
Order Rhynchota—Imperfect metamorphoses, suctorial mouth. Bugs.
Order Thysanura—Imperfect metamorphoses. No wings. Divided tail. Spring-tails.
Order Euplexoptera—Abdomen with terminal forceps. Earwigs.
Order Thysanoptera—Four equal membranous wings. Thrips.
Order Orthoptera—Anterior wings usually shorter and firmer. Grasshoppers, &c.
Order Neuroptera—Two pairs of glassy wings—equal.