NEUROPTERA. 



429 



in considerable troops are representatives. The latter has lately 

 been discovered in England. 



Fig. 412. Bittacus tipularis. Fig. 413, Boreus hyemalis (magnified and natural size). 



The Phryganida, or Caddis-flies, are known by their larvae, of 

 which anglers make great use. Reaumur classed them as aquatic 

 moths. Their soft and delicate body is protected by a case, to 



Fig. 415. Phryganea rhombica, 

 in repose. 



Fig. 414. Larva of Phryganea rhombica. Fig. 416. Phrygaiiea rhombica. 



which they cling by two hooks, placed at the extremity of their 

 abdomen. They are called by different names in allusion to their 



