46 THE PHRYGANIiyE. 



the aquatic kind, one of which is called by 

 naturalists Pltryganida, and the other Ephemeridce. 

 The former is included in the order Trichoptera 

 and the latter in the order Neuroptera. The 

 phryganidas are familiarly termed cad or caddis 

 flies, and sometimes water moths. The different 

 British species, of which there are upwards of 

 two hundred, are known by the names of gran- 

 nam, sand fly, hare's flax, and from their colour, 

 yellow flies, cinnamon flies, and the like. Flies 

 of this family are distinguished, among other more 

 minute peculiarities, by four large dark- coloured 

 wings, pervaded by numerous veins, through 

 which the blood or, more correctly speaking, a 

 fluid corresponding to what in animals is called 

 the blood is said to have been discovered to 

 circulate. The wings are longer than the body 

 of the insect, and when at rest lie flat along its 

 back the foremost and larger pair being folded 

 over the hindermost pair. The shape and position 

 of the wings, indeed, resemble those of moths, 

 but the downy substance found upon the wings of 

 the latter is altogether wanting. The antenna, 

 or feelers which emanate from the front of the 

 head, and appear like horns are very long ; 

 and the legs are long, dark, and slender. 



The females lay their eggs upon the leaves of 



