CHAPTER XV 



jSTETJROPTEKA MALLOPHAGA EMBIIDAE 



Order III. Neuroptera. 



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

 as well as the posterior membranous, usually ivith extensive 

 neuration, consisting of elongate nervures and either of 

 short cross-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 ivingless forms are few.} 

 The metamorphosis differs in the several divisions. 



FIG. 212. Osmylus chrysops, 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, 



