Various shapes

John Bernhard Smith, Our insect friends and ennemies, Philadelphie & Londres, J. B. Lippincott, 1909, p. 91.

The caddice-flies or Trichoptera are aquatic in the larval stage and as aerial adults do not feed at all. As larvae they derive their name from their habit of making cases or « caddices » of various shapes from little sticks or stones closely fitted and held together with silk.