\ STONE-FLIES. 75 
men. It lurks among stones till its wings be fully 
grown and it assumes the form of a perfect fly. 
In this last state the stone-fly has a thick body, 
of about an inch in length, of a brown colour, with 
yellow markings underneath. It has four wings, 
which lie flat on the back, the two upper ones of a 
speckled grey, reticulated with darker coloured veins, 
folding back over the lower ones., It greatly resembles 
a moth, but its wings are not covered with the fine 
scales that give a powdery appearance to the lepi- 
dopterous tribe of insects. The cadis-flies are ranked 
in the order T'richoptera, and Mr. M‘Lachlan, at a late 
meeting of the Entomological Society, described 124 
British species, arranged in 43 genera. As an artificial 
fly the wings are formed by the matted feather of a 
hen pheasant. The body may be of almost any kind 
of a dark brown fur mixed with yellow camlet or 
mohair, so as to show the most yellow near the tail 
and belly of the fly. A grizzled hackle wrapped 
round under the wings affords a good imitation of 
the natural insect’s legs. Two hairs from the whis- 
kers of a black cat may be employed to represent the 
antenne, but, considering the gut itself quite sufficient, 
the writer never uses them. The stone-fly has no 
whisk or caudal termination, as is erroneously de- 
picted in Ronald’s Fly-Fisher’s Entomology, and in 
the edition of Walton’s Complete Angler edited by 
Ephemera. 
