64 



LACE WING GROUP. 



Key given by Dr. R. J. Tillyard. 



Key to distinguish the Five Orders 



Odonata, Plectoptera, Neuroptera, Tri- 



choptera and Lepidoptera. 



Metamorphosis incomplete, wings with a 

 network of veins 2 



Metamorphosis complete, no network of 

 veins on wings (except in some of the 

 Neuroptera) 3 



' Wings equal in size or nearly so ; quite i 

 hairless . . Odonata or Dragonflies 



Wings very unecjual, the hind ones much 

 reduced ; two winged stages, of which 

 the first or sub-imago has wings with 

 numerous minute hairs, the second or 

 imago, hairless wings . . . . 



Plectoptera or Mayflies 



Larva with mandibles and maxil 

 forming a pair of sucking tubes ; imago 

 with complete mandibulate mouth- 

 parts . . Neuroptera or Lace Wingj 



Larva a caterpillar; mouth parts of image 

 not mandibulate ^ 



