428 THE INSECT WORLD. 
in considerable troops—are representatives. The latter has been 
found in England. 

Fig. 412.—Bittacus tipularis. Fig. 413.—Boreus hyemalis (magnified and natural size) 
The Phryganide, or Caddis Flies are known by their larvee, of 
which anglers make great use. Réaumur classed them as aquatic 
moths. The soft and delicate body of the larvee is protected by a 







































ae 
cal 
Fig. 415.—Phryganea rhombica, 
in repose. 
Fig. 414.—Larva of Phryganea rhombica. Fig. 416.—Phryganea rhombica. 
case, to which they cling by two hooks, placed at the extremity of 
their abdomen. They are called by different names in allusion to 
