Injurious insects and useful birds, successful control of farm pests / by F.L. Washburn.

  • F. L. Washburn
Date:
[1918]
Catalogue details

Licence: Public Domain Mark

Credit: Injurious insects and useful birds, successful control of farm pests / by F.L. Washburn. Source: Wellcome Collection.

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    eyes. The metamorphosis is incomplete. The larval or nymph stage is passed in the water (Fig. 15). Order Plecoptera.—Insects with four membranous wings, hind Fig. 13. Ant-lion with larva, enlarged and natural size. wings much larger than fore wings, and when not in use folded in plaits. Wings lie flat upon the abdomen when the insect is at rest. Biting mouth parts frequently poorly developed. Metamorphosis incomplete, nymphs living in water. Example, stone flies. © Fig. 14. A caddis-fly, showing c, larva, removed from its case; b, adult; e, pupa. On the right is a case made of stems. Order Isoptera. Social insects, colonies including queens, kings, and workers, only the first two casts being winged, and then only temporarily. Mouth parts formed for biting; incomplete
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