XI 



1MIYLUM ARTHROPOD A 



633 



This order includes Earwigs, Cockroaches, Stick- and Leaf- 

 insects, Grasshoppers, and Locusts (Fig. 507). 



Fir; ".i 17. I.ocusta. (From Cuvicr's 

 Animal Kiviidom.) 



Fio.508.— Ephemera (May-fly)and 

 larva. (After Guerin and Pcrcheron.) 



Order 3. — Nelu&qptera. 



Insects with two pairs of netted membranous wings. The parts 

 of the mouth are adapted for biting. The prothorax is free from 

 the other segments of the thorax. The metamorphosis is some- 

 times complete, sometimes incomplete. 



This order includes Termites (" W hite A nts "), May-flies (Fig. 

 508), Dragon-flies, Ant-lions, and Caddis-nTes. ' 



Order 4. — Hemiptera. 



Insects in which wings are usually present, sometimes similar, 

 sometimes dissimilar, and in which there is a jointed suctorial 



Fio. 509.— Aphis rogae and larva. (From Cuvier's Animal Kingdom.) 



