The Life Story of Insects By Geo H Carpenter
The Life Story of Insects By Geo H Carpenter
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But in different groups of in- sects we find different degrees of likeness between pupa and imago. In a beetle pupa (see fig. 16 c), the appendages feelers, jaws, legs, wings stand out from the body as do those of the perfect insect. This type is called a, free pupa. The pupal cuticle has to be shed for the emergence of the imago, but the pupa is already a somewhat reduced model of the final instar, with abbreviated wings and doubled-up legs. A free pupa is characteristic of the Coleoptera, Neu...roptera, Trichoptera, Hyineuoptera and many vn] PUPAE AND THEIR MODIFICATIONS 81 Diptera. In some cases the pupa requires to be specially adapted for a peculiar mode of life; for example, a special arrangement of breathing organs may be necessary for life under water, and there must needs be temporary pupal structures, not represented in the imago. On the other hand, in the pupae of most Lepido- ptera and of some Diptera, there is more or less coalescence between the cuticle of the appendages and the cuticle of the body generally, so that the appendages do not stand out, but being, as it were, glued down to the body, are somewhat masked (see fig.
What to read after The Life Story of Insects By Geo H Carpenter?
You can find similar books in the "Read Also" column, or choose other free books by George H George Herbert Carpenter to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
But in different groups of in- sects we find different degrees of likeness between pupa and imago. In a beetle pupa (see fig. 16 c), the appendages feelers, jaws, legs, wings stand out from the body as do those of the perfect insect. This type is called a, free pupa. The pupal cuticle has to be shed for the emergence of the imago, but the pupa is already a somewhat reduced model of the final instar, with abbreviated wings and doubled-up legs. A free pupa is characteristic of the Coleoptera, Neu...roptera, Trichoptera, Hyineuoptera and many vn] PUPAE AND THEIR MODIFICATIONS 81 Diptera. In some cases the pupa requires to be specially adapted for a peculiar mode of life; for example, a special arrangement of breathing organs may be necessary for life under water, and there must needs be temporary pupal structures, not represented in the imago. On the other hand, in the pupae of most Lepido- ptera and of some Diptera, there is more or less coalescence between the cuticle of the appendages and the cuticle of the body generally, so that the appendages do not stand out, but being, as it were, glued down to the body, are somewhat masked (see fig.
What to read after The Life Story of Insects By Geo H Carpenter?
You can find similar books in the "Read Also" column, or choose other free books by George H George Herbert Carpenter to read onlineMoreLess
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