The natural history of insects. First series.

Date:
1833
Catalogue details

Licence: Public Domain Mark

Credit: The natural history of insects. First series. Source: Wellcome Collection.

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    always reproduced : in this state the insect is inca- pable of producing its kind. In the state of pupa, nymph, or chrysalis, the insect is ordinarily incapable of taking food, and contains within itself a sketch of its ultimate form. ( Naturalists have described various states of metamorphosis; all these, however, may be reduced to two : 1. Partial metamorphosis, in which the insect does not vary in its form in such a way as not to be recognised in all its states as the same individual. 2. Complete metamorphosis; in which the pupae take no food, are incapable of motion, and the change is such, that nothing but the evi- dence of sense could convince us of the identity of the insect in its first and its last state.