Edward George Boulenger, The aquarium Book, Londres, Duckworth, 1925, p. 144-145.

The larvae of the Caddies flies are eminently suited to small aquaria.
The insects spend their “caterpillarhood” at the bottom of ponds or streams, where most forms construct tubular houses from shells, gravels, sticks, etc., wherein to conceal their soft and defenceless bodies. They will, if provoded with coloured beads or sequins, use such material with novel ans ornate effects.
The instinct of orientation in these larvae is very remarkable and they will nearly always return to their own homes if expelled, even when repaced in the midst of a large number of empty cases of similar appearance.