human
Salmonia. The _phrygancæ_ (the
gpt
of the angler) have long antennæ, with veined wings which fold over each other when closed. The eggs of the adult flies are laid on the leaves of willows or other trees which overhang the water. When they are hatched, the larvæ fall into the stream, collect a panoply of gravel, bits of stick, shell-fish, &c., to surround them, and after feeding for a time on aquatic plants, rise to the surface, burst their skins, and appear as perfect flies. The _ephemeræ_ (or
human
May-flies