Entomology : with special reference to its ecological aspects / by Justus Watson Folsom.

  • Justus Watson Folsom
Date:
1923
Catalogue details

Licence: In copyright

Credit: Entomology : with special reference to its ecological aspects / by Justus Watson Folsom. Source: Wellcome Collection.

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    ferred to the abdominal region. Tarsi one- or two-segmented. Abdomen usually short and broad, eight- to ten-segmented. Cerci absent. Fig. 19.—Pteronarcys regalis. A, nymph (after Newport); B, imago. Slightly reduced. Biting lice, or bird lice, parasitic on birds and a few mammals, feeding on feathers, hair or skin. Example, Menopon (Fig. 18). More than fifteen hundred species have been described.
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