Figures 6.4


Stages in the development of the wings of the cabbage white or cabbage butterfly, Pieris rapae (Lepidoptera: Pieridae).
Figures 6.4. Stages in the development of the wings of the cabbage white or cabbage butterfly, Pieris rapae (Lepidoptera: Pieridae).

A wing imaginal disc in an (a) first-instar larva, (b) second-instar larva, (c) third-instar larva, and (d) fourth-instar larva; (e) the wing bud as it appears if dissected out of the wing pocket or (f ) cut in cross-section in a fifth-instar larva. ((a-e) After Mercer 1900)

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  Life cycle of a holometabolous insect, a bark beetle, Ips grandicollis, showing the egg, the three larval instars, the pupa, and the adult beetle.
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  Embryonic development of the scorpionfly Panorpodes paradoxa (Mecoptera: Panorpodidae):