208 GLAUCUS ; OR, 
insects, as the “caddises,” rising to the surface, 
become flying Phryganez (caperers and sand-flies), 
generally of various shades of fawn-colour; and 
the water-crickets (though an unscientific eye may 
be able to discern but little difference in them in 
the “larva,” or imperfect state) change into flies 
of the most various shapes ;—one, perhaps, into 
the great sluggish olive “Stone-fly” (Perla bicau- 
data) ; another into the delicate lemon-coloured 
“Yellow Sally” (Chrysoperla viridis); another into 
the dark chocolate “ Alder” (Sialis lutaria): and the 
majority into duns and drakes (Ephemerz) ; whose 
grace of form, and delicacy of colour, give them a right 
to rank among the most exquisite of God’s creations, 
from the tiny “ Spinners” (Baétis or Chloron) of in- 
candescent glass, with gorgeous rainbow-coloured eyes, 
to the great Green Drake (Ephemera vulgata), known 
to all fishermen as the prince of trout-flies. These 
animals, their habits, their miraculous transforma- 
tions, might give many an hour’s quiet amusement 
to an invalid, laid.on a sofa, or imprisoned in a sick- 
room, and debarred from reading, unless by- some 
