XI 



PHYLUM ARTHROP( > I > A 



617 



Gressoria or Walkers (Stick-and-Leaf Insects, Praying Insects) ; 

 and (3) the Oursoria or Runners (Earwigs, Cockroaches). 



! 



FH;. .">! 4. Locusta. (From Cuvier's FK;. 515. An Embiid (Oligoloma michaeli) mas- 

 . I ni/ititl. K huiilmn.) nitied. (From the Cambridge Natural History , 



after McLachlan.) 



Sub-order 2. -Isoptera. 



Orthopteroidea which form organised communities composed of 

 soldiers, workers, and male and female sexual individuals. Mem- 

 branous anterior and posterior wings are developed in the sexual 

 individuals, but are soon thrown off. 



This sub-order comprises only the Termites or " White Ants." 



Sub-order 3. Embiid . 



Minute Orthopteroidea with rather long and narrow bodies 

 (Fig. 515) ; winged or wingless the wings when present mem- 

 branous, not caducous but persistent. Communities are not 

 formed. 



Sub-order 4. Psocidcv. 



Minute Orthopteroidea with comparatively short thick bodies, 

 slender antennae, and usually with 

 delicate membranous wings, the an- 

 terior pair the larger. 



This sub-order (Fig. 516) includes 

 Book-lice and Death-watches. 



FIG. 516. A winged Psocid (Psocus 

 fasciatus), magnified. (From the Cam- 

 bridge Natural History, after McLachlan.) 



Fi(i. 517. One of the IWallophaga in- 

 habiting the common fowl. (From the 

 Cambrvl'je Natural History, after Plaget.) 



