CHAPTER XV 



NEUEOPTERA MALLOPHAGA EMBIIDAE 



Order III. Neuroptera. 



Imago tvith biting mouth ; tvith two pairs of wings, the anterior 

 as well as the posterior membranous, usually tvith extensive 

 neuration, consisting of elongate nervures and either of 

 short eross-nervules forming numerous cells or of a, com- 

 plex minute mesh -work. {One division, Mallophaga, con- 

 sists entirely of wingless forms ; in Termitidae some of the 

 individuals of each generation become winged, but others 

 do not: except in these cases adult wingless forms are feiv.) 

 The metamorphosis differs in the several divisions. 



Fig. 212. — Osmylus clirysnps, New Forest. 



The Neuroptera form a heterogeneous, though comparatively 

 small, Order of Insects, including termites, stone-flies, dragon- 

 flies, may-flies, caddis-flies, lace- wings, scorpion-flies, ant-lions, etc. 

 Bird-lice are also included in Neuroptera, though they have no 

 trace of wings. 



We treat the Order as composed of eleven distinct families. 



