Figures 3.15


Longitudinal section through the anterior body of a caterpillar of the cabbage white butterfly, Pieris rapae (Lepidoptera: Pieridae).
Figures 3.15. Longitudinal section through the anterior body of a caterpillar of the cabbage white butterfly, Pieris rapae (Lepidoptera: Pieridae).

Note the thickened epidermal layer lining the midgut.

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  Preoral and anterior foregut morphology in (a) a generalized orthopteroid insect and (b) a xylem-feeding cicada.
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  Generalized scheme of the endo-ectoperitrophic circulation of digestive enzymes in the midgut.