John Hill, A decade of curious insects, Londres, chez l’auteur, 1773.

Genus V
Day-Fly
Phryganea

..But the worm hatched from the egg of this fly lives and feed heartily in the waters, enjoying a much longer date, and that in more security . For it covers its tender frame with a motley case of its own constructing; and gormandizes unsespected, and unseen. For one or sometimes nearly for two years.