If we touch

Anonyme, The Museum News. The Brooklyn Institute of Arts and Sciences, New York, 1911, p. 75.

Children who notice the « live things » in the Museum aquaria will enjoy watching the two large of the Caddis Fly in one of the jars.

Adult Caddis Flies look so much like certain moths that they are often mistaken for them by young entomologists but the larvae live in the water where they clim and feed upon submerged vegetation. Each larva occupies a little case of cylindrical form, made of various materials selected from the vegetation or the bed of the pond. It moves about actively pulling its home along as it goes, but never exposing more of its body than is necessary to allow the free movement of its legs. If we touch one of the insects, or pic kit up by holding the case between the finger and thumb, the front part of the body is immediately retracted within the tube which now appears quite devoid of life. One of these tubes is a perfect little cylinder about an inch long and three-sixteenths of an inch diameter, made of scrapes of very thin, dead leaves fitted in a single layer like perfect mosaic. The other tube is made of rough scraps of wood, green leaves, stems and plant fibres, and ornamented on the outside with capsules of mosses. The cases of Caddis Flies vary greatly in shape and structure as the larva has to use for its protection whatever materials it finds in the water where it lives. Sometimes beautiful cases are made of transparent grains of sand, while others are ornamented with the shells of tiny mollusks.