Anonyme, The History of Insects, Londres, The Religious Tract Society, 1839, p. 111-112.

One forms a pretty case of leaves glued together lengthways, but leaving an opening sufficiently large for the inhabitant to put out his head and shoulders, when it wishes to look about for food. Another uses pieces of reed, grass, straw, wood, etc. cut into convenient lengths, carefully joining and cementng each piece to its fellow as the work proceeds ; and he fraquently finishes the whole by adding a broad piece, longer than the rest, to shade his door-way over head, so that he may not be seen from above. Another weaves together a group of the leaves of aquatic plants into a roundish ball, and in the middle of this form a cell. Others form houses, which may be called alive, making them of the shells of snails and muscles, even while inhabited ;