88 INVERTEBKATE ANIMALS. 



II. Order Mallophaga. Bird-lice, with biting jaws, 

 PJiiloptera, several species of which are said to be found 

 on the same animal. 



III. Order Thysanura. Spring-tails, Poclura, Lepis- 

 7na. 



Walckenaer describes 300 species of the first two 

 Orders, and 106 of the third. The British species of the 

 first two Orders have been described by H. Denny ; 

 those of the last have appeared very recently in a beau- 

 tiful monograph by Sir John Lubbock. 



Group 198.— HETEROPTERA-Geocorisa. yij, the earth ; 

 Mpig, a bug. Notwithstanding the bad reputation 

 attached to this group, by reason of its including the 

 common House-bug and some exotic species far more 

 severely noxious, we here meet with curiously fanatistic 

 shapes and brilliant contrasts of colour. The British 

 species, though small, are frequently beautiful, and have 

 been described in an excellent monograph by J. W. 

 Douglas. 



iy Observe the foliaceous expansions on the legs of 



Diactor, the protective mimicry in Phloea, and 



the prismatic reflexions in some of the Sciitel- 



lericke. 

 Small series of British species presented by J. W. 



Douglas. 



Order HOMOPTERA. 6[j,og, like ; Trrspov, a wing. 

 Wings four, entirely membranous and deflexed. 

 Group 199.— Family FULGORID^. Fulgor, brightness; 

 and allies. 



II Examples : Lantern-flies, Fulgoridce ; the China 

 Wax-insect Flata ; Frog-hoppers or Cuckoo- 



