Insect groups in the Class Insecta are organised into ‘Orders’, and these are split down the middle into insect orders that undergo complete metamorphosis (holometabolous: egg->larvae->pupa->adult) and those that undergo incomplete metamorphosis (hemimetabolous: egg->nymph->adult).
From the largest to smallest order, these links will take you to introductions on the 6 most speciose orders of insect:
– Beetles, the sheath-winged – Coleoptera
– Butterflies and Moths, the scale-winged – Lepidoptera
– Flies, the two-winged – Diptera
– Bees, ants and wasps, the membrane-winged – Hymenoptera
– True bugs, the half-winged – Hemiptera.
– Grasshoppers and crickets, the straight-winged – Orthoptera
– And everything else – Other Orders